Find top international advertising agencies skilled in media buying, brand strategy, and creative development to achieve strong ROAS and measurable business outcomes. Compare agencies by expertise, location, and budget to find your partner.
Our Verified Agencies are Trusted by Top Brands:
We have assessed over 5,200 advertising agencies worldwide, examining their creative capabilities, service diversity, portfolios, client testimonials, pricing structures, and industry recognition. Learn about our ranking criteria and how we identify the top players in the advertising industry.
The Number 1 Advertising Agency as Selected by DesignRush Is:
Notable clients: Caliber Collision, BBQGuys, Warner Bros, Ebay, Ziebart
HigherVisibility offers PPC and advertising solutions, including paid search, display, shopping ads, remarketing, local service ads, custom landing page creation, and audience targeting. The advertising agency employs a hands-on approach, encompassing deep keyword research, A/B ad/image testing, bid and budget management, negative keyword lists, geo-targeting, and quality score performance.
Its technology and methodology are anchored around the Targeted Growth System®, which ensures efficient ad spend. With nods from DesignRush and Inc. 500, a sharp strategy, and stellar client service, HigherVisibility continues to set the bar for effective, accountable PPC management.
HigherVisibility demonstrated its ability to manage large, complex PPC campaigns through its work with Caliber Collision.
The agency designed a customized paid search strategy centered on precise targeting, ongoing optimization, and continuous campaign refinement. By handling keyword research, bid management, and conversion tracking, HigherVisibility ensured that every advertising dollar was used efficiently and profitably. Its approach delivered strong, measurable results, including a 323% increase in return on ad spend and a 167% increase in conversions, which helped Caliber Collision strengthen its position as a leader in the auto repair industry.
Doner is a full-service advertising agency founded in 1937 and headquartered in Southfield, Michigan, with additional offices in Los Angeles and London. Doner's approach includes diversity, inclusivity, and a modern, content-driven method tailored to today's dynamic advertising market.
Renowned for creating iconic campaigns for major brands, Doner has crafted memorable slogans like "Timex takes a licking and keeps on ticking" and "Zoom-Zoom" for Mazda. The agency specializes in retail, consumer packaged goods (CPG), healthcare, consumer technology, destination, entertainment, and automotive industries.
Doner successfully refreshed the image of the Chrysler Pacifica by tapping into cultural trends while staying grounded in real family needs.
Chrysler wanted to make the Pacifica more appealing to modern families, and the rise of the #VanLife trend created an opportunity to shift perceptions of the minivan. Doner connected this trend to everyday parenting by highlighting Pacifica’s practical, family-friendly features through engaging video content across broadcast and social media.
By blending aspiration with real-life usefulness, the campaign repositioned the Pacifica and delivered strong results, including a 143% year-over-year increase and a 95% increase in second-quarter sales.
FCB (Foote, Cone & Belding) is a globally recognized advertising agency known for its innovative and effective advertising and marketing campaigns. As part of the Interpublic Group, FCB has a substantial global footprint, with over 120 offices across over 80 countries.
FCB's impact is validated by numerous awards and recognitions in the industry, including the Cannes Lions and Effie Awards. The agency combines creative storytelling with deep insights into consumer behavior, aiming to create accessible advertisements that capture attention and drive meaningful results for its clients.
During the 2022 FIFA World Cup, Brazilian football fans wanted to support their national team by wearing the official jersey. However, the high cost of the jerseys (R$350) was a significant barrier, especially given the inflation Brazilians were facing at the time. This situation challenged FCB's client, Flash, to engage with fans and allow them to express their support.
FCB offered a 50% cashback on jersey purchases from Nike's eCommerce site in exchange for fans customizing the jersey with Flash's brand name and sharing it on social media. This campaign turned fans into brand sponsors and significantly boosted Flash's visibility, getting more than 5.1 million interactions and increasing brand mentions by 2300%.
Marketing Architects is an all-inclusive TV advertising agency, renowned for integrating technology and data into its campaigns. With its unique All-Inclusive TV model, the agency handles all aspects of a campaign, including media buying, strategy, creative development, production, and reporting. Therefore, clients pay only for media while saving on other costs.
The strategy is powered by Annika, the agency’s own AI for media buying that analyzes large datasets to optimize media placements across linear and streaming TV. Marketing Architects serves B2B and B2C clients, using TV advertising as a key growth driver.
Joybird, a furniture retailer and manufacturer primarily focused on online marketing, wanted to expand its customer base and reach new audiences through offline channels. Marketing Architects launched TV ads on linear and streaming platforms, minimizing audience overlap with Annika's help.
The campaign led to over 700,000 web visits driven by TV, over 16,000 TV-attributable orders, and 7-10X return on ad spend (ROAS).
Notable clients: Montgomery County, MD, Remote Area Medical, Parkmobile, FlyingFish, Chicago Title
The AD Agency, founded in 1982, is a full-service research, marketing, online digital advertising, graphic design, media buying, IT support, and public relations firm.
Known for its aggressive and agile approach, the award-winning agency focuses on effective communication strategies. With a reputation for on-target marketing, its expertise lies in developing brands and maximizing client visibility and impact.
The AD Agency developed a comprehensive marketing strategy for Montgomery County, MD, to promote yard waste recycling. The multi-faceted campaign included a strategic marketing plan, a new branding and logo, and diverse advertising efforts across print, radio, and TV. Key to the campaign was engaging, information-rich content paired with an emotional appeal to change resident behavior.
The initiative featured full-page newspaper ads, a grasscycling campaign, TV commercials, public relations, community outreach, and direct mail. It also introduced "Digger the Worm" in a school natural science project. Thanks to this approach, Montgomery County, MD achieved the desired behavioral change and gained national and local recognition.
Notable clients: UPN, Masport, Custom View, The Waterford, NCBVI
PLAY Creative Design is an advertising agency that prioritizes strategy development before launching creative tactics. It achieves results through campaign engagement, targeted messaging, and a blend of print and digital media.
PLAY Creative grows businesses through website optimization, quality messaging, and precise media management, increasing brand awareness, customer retention, and lead generation. It serves businesses in the finance, higher education, and tech industries, as well as small businesses.
Unite Private Networks (UPN) faced the challenge of effectively targeting businesses in six specific locations. PLAY Creative decided to focus on LinkedIn and Google Display Advertising. It created dedicated ad groups for each location, combining precise targeting with tailored landing pages and submission forms for more efficient lead generation.
The campaign’s results outperformed industry standards for both platforms over 3.5 months.
Notable clients: CALM, Volkswagen, Team Heroine, National Lottery, Marmite
DDB is an advertising agency that uses emotionally driven solutions to influence consumer behavior and choices. Driven by its "Unexpected Works" mantra, it strives to create work that drives behavioral changes and achieves significant business results.
In response to the UK's escalating suicide rate in 2022, DDB partnered with CALM and ITV to fight the suicide crisis by changing public perception. "The Last Photo" campaign featured an exhibition of 50 last photos of suicide victims and a 90-second film distributed across television, cinema, outdoor, digital, and social media channels. It also directed the audience to CALM's website for suicide prevention.
"The Last Photo" drew over 500,000 visitors to the exhibition, reached 7.5 million people through live TV, and generated 1.6 billion impressions. Additionally, it became the most talked-about video on Reddit globally for 48 hours and increased online discussions about suicide by 33%.
Financially, it led to a 400% year-over-year rise in donations to CALM. Most significantly, the campaign was crucial in preventing 161 suicides in the six months following its launch.
With offices in major cities worldwide, Wieden+Kennedy (WK) is a global, independent advertising agency known for transforming some of the world's most famous and fascinating brands for over 40 years. It has earned several accolades, including Emmy Awards and recognition as global agency of the year.
W+K provides world-class creative, media, social, design, and strategy services with a core mission: to use creativity and influence to change the world and shape culture. The agency gained fame for its work with Nike, crafting the iconic "Just Do It" tagline.
Nike faced the challenge of promoting women's fitness and sports. W+K created the "Better for It" campaign, inviting women globally to share their fitness journeys and personal bests.
This campaign included "Margot vs Lily", a scripted series about two sisters with differing fitness goals, directed by Tricia Brock. It also launched Nike's first Tumblr site and short films "Inner Thoughts" and "Last," encouraging women to share their fitness missions.
"Margot vs Lily" led to 3.5 million downloads of the Nike Training Club App and inspired two million new workouts. The campaign's Tumblr quickly gained 175,000 followers, becoming the most reblogged fashion brand of 2015. Moreover, two months after the campaign's launch, Nike's women's division sales increased by 20%.
Notable clients: De'Longhi, Samsung, ESPN, Ad Council, Little Caesars
McKinney is a full-service integrated agency with 54 years of experience specializing in strategy, creative development, production, and digital measurement. It includes a full media entity and provides a wide range of services, including media strategy, activation, and optimization.
Its philosophy is to provide clients with a perspective that differs from the Madison Avenue standard. Recognized for creativity and effectiveness, McKinney has been named a top agency by Adweek, Campaign US, and Influencer Marketing Hub.
De'Longhi, known for its espresso machines, wanted to expand into the North American automatic coffee machine market. McKinney launched the TrueBrew campaign starring Brad Pitt to highlight the machine's appeal in a realistic, emotionally resonant way.
The campaign increased brand engagement by 134% compared to the previous three months and led to strong sales, reaffirming the success of the celebrity-driven strategy.
Grey is an advertising agency with over a 100-year legacy. Its expertise includes advertising, communications, and design, especially in the health and wellness industry. Grey is part of AKQA, an international family of autonomous agencies.
Its "Famously Effective" approach produces memorable and highly effective ads. The agency taps into "Cultural Value" to understand what resonates in society and culture, ensuring its campaigns connect deeply with audiences and achieve results.
Dole Sunshine Company wanted to address the stigma associated with the "forbidden fruit" to encourage healthier eating and start a global discussion about the importance of fruit. The agency humorously requested Pope Francis to rebrand the fruit's bad image, suggesting a biblical revision to replace "fruit" with an unhealthy snack.
The campaign was launched on International Fruit Day 2022. It generated over 55 million media impressions and appeared in 784 media outlets, including Design Taxi and Bloomberg, earning $2.2 million in media value. This innovative approach significantly raised awareness about the benefits of fruit and a healthy diet.
To select the top advertising companies, we reviewed their testimonials, case studies, industry reputation, team expertise, client roster, and executive management. Our team of agency experts developed a scoring system to measure their overall performance based on several important factors:
Reviews: Quality of work, client satisfaction, and level of trustworthiness
Portfolio: Tangible examples of an agency's track record
Awards and press: Industry reputation and innovation
Team bios: The agency’s qualifications and team dynamics
Top services: Core competencies and areas of expertise
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.
Japalize Boost helps overseas brands build a stronger presence in Japan through Japanese localization and hands-on marketing support. We adapt websites, messaging, content, and customer journeys for Japanese expectations, combining native-language expertise with practical market execution...
Spanish-speaking digital advertising agency for Hispanic business owners in the US. We run Facebook, Instagram and Google Ads campaigns and build landing pages and websites designed to turn clicks into calls and messages. Based in Tampa, serving service businesses across Florida...
Dubai digital marketing agency in Al Qusais serving businesses across the UAE. Manqoosh runs social media management and paid social on Instagram, Facebook, TikTok and Snapchat, SEO, Google Ads and performance marketing with clear reporting on leads and cost per result. The team also builds websites on...
Macfor connects marketing strategy with hands-on execution through dedicated teams. Combining data science with creativity, the agency delivers content, SEO, paid media and conversion optimization. Its industry expertise includes agribusiness, healthcare and retail, with specialized practices in Macfor Agro...
Kingdom Vision is a digital agency specializing in web design, web development, and custom software solutions for businesses and startups. The company offers a range of services including mobile app development, CMS development, branding, and digital marketing to help clients build and grow their online...
성장마케팅 (GROWTH MARKETING) has grown businesses that win by persuasion and explanation.We break the customer decision journey into stages, and one integrated team SEO, GEO, content, and performance tests and improves every step. Results follow...
Meta ads and Google Ads agency in Dubai for beauty salons, gyms, pilates studios, dental clinics and real estate. Performance marketing and lead generation on a flat monthly fee from AED 2,950. You own your ad accounts, no lock-in, every lead tracked to WhatsApp...
Meta and TikTok ads for Moroccan e-commerce brands
New Visions helps Moroccan clothing, modest fashion, bags, jewellery and beauty brands grow their cash-on-delivery e-commerce businesses through Meta and TikTok advertising, video ad creatives and conversion-focused Shopify and WooCommerce stores. Founded in 2021, our team works remotely across Morocco and...
Your full-service marketing and e-Commerce agency for 20 years!
KOM is a digital and e-commerce agency that brings order to chaos with method, data, and transparency. We work for managers and SMEs with 20+ years of experience, using the ADAM method (Analyze, Design, Expand, Measure) and clear reporting. We design e-commerce and converting websites (Shopify, WooCommerce)...
No Studio. No Casting. No Compromise. The Unmakeable, Made Visible.
LOOM Studio is an AI-powered creative production agency specializing in campaign-grade video and imagery. Led by award-winning designers, the agency combines creative direction with advanced AI technology to produce high-quality visual content for brands across advertising, marketing, and e-commerce...
WEDEV IT emerged from a deep-rooted passion for web design and swiftly ascended to a prominent position within Romania's industry landscape. Committed to our mission, we strive to provide an all-encompassing spectrum of web services, ensuring the triumphant completion of every project...
From strategy development to execution, measurement and optimization our full-service agency becomes a strategic partner in achieving your marketing goals and accelerating your business success...
We connect strategy and creativity to turn visibility into growth. At Kokolski, SEO, design and performance work together to attract, engage and convert. No templates, no guessworkjust clear thinking, sharp execution and measurable results...
RICE Web is a Netherlands-based B2B web agency specializing in strategic, creative, and performance-focused websites for entrepreneurs and businesses. The agency combines UX/UI design, custom web development, SEO and tracking, and online advertising to turn B2B objectives into measurable results. Its approach...
Turning Clicks And AI Visibility Into Measurable Growth
ROI index helps businesses turn online attention into customer demand through PPC, SEO and AI visibility. Led by a founder with over 22 years of marketing experience, we connect advertising performance with how brands are discovered in search and AI answers...
Chalk Creation stands as a boutique advertising and design agency situated in Johannesburg, South Africa. Our compact yet dynamic team equips us to effectively handle projects of varying scales, catering to both extensive and more intimate endeavors. Our dedication lies in supporting Small, Medium, and Micro...
With a network of 150K+ content placement sites, Adsy enables data-driven link building, digital PR, and content distribution at scale. We focus on measurable ROI, transparency, and long-term partnerships helping our clients grow visibility and authority across competitive markets...
iCopify is a digital marketing and link-building platform that helps businesses, agencies, and marketers improve their online visibility. It offers services including guest posting, high-quality backlinks, Digital PR, SEO, content creation, link insertions, and content syndication, connecting brands with...
Over a decade of experience, sharpened for the future of search.Razor Signal brings together years of experience in SEO, conversion optimisation and digital performance to help businesses improve their online visibility and grow with confidence. We take a focused, data-led approach to identifying...
Ward Creative is an Essex-based creative agency helping businesses communicate more effectively through great ideas, strong design and engaging creative content...
North Marketing is a marketing agency in Mexico City, Tulum and Argentina, serving Latin America, the United States and Europe since 2020. We connect strategy, autonomous AI agents for WhatsApp and Instagram, UGC content, multivariant ads on Meta, Google and ChatGPT, and local SEO for Google Maps and AI...
Digital Mom Rakhi is a leading digital marketing agency that combines contemporary strategies with personalized care. We specialize in online platforms and provide services such as social media marketing, SEO, content creation, and email marketing. With a nurturing approach symbolized by 'Mom' and 'Rakhi,' we...
Elevating Your Digital Presence, One Click at a Time: Your Trusted SEO Consultant in Melbourne
Discover unparalleled digital growth with SEO Consultant Melbourne. Our expert team crafts tailored strategies to elevate your online presence, driving organic traffic and boosting visibility. From keyword optimization to content creation, we're dedicated to delivering results that exceed expectations. Trust...
Online marketing services like as website design, app development, search engine optimisation (SEO), social media marketing, content writing, blog posting, and more may be easily and affordably accessed through TECH Codence Technologies. Take your business to the next level by starting with us...
We are a digital marketing agency focused on generating real and impactful results for our clients. We combine innovative strategies and best market practices to boost sales, strengthen brands and consolidate businesses. Our commitment is to deliver excellent work, always aligned with the latest trends, to...
ELKEON supports businesses with data-driven performance marketing focused on measurable growth. Their services include Google Ads campaigns, marketing automation, web analytics and tracking, as well as B2B lead generation...
Piliverse is a digital agency helping businesses build stronger online brands through web development, eCommerce solutions, shopify store, digital marketing, an creative content.We combine strategy, design, an technology to create pratical solutions that help brands attract customers, improve conversions, an...
Digital Marketing Consultancy Specializing In Growth
Metris is a digital marketing consultancy specializing in performance marketing, e-commerce growth, and data-driven digital strategies. With more than 17 years of experience in digital marketing and e-commerce, the company helps businesses improve customer acquisition, conversion, and retention through...
Automate. Elevate. Dominate. "Turning Your Leads Into Revenue Machines"
AvioneX Digital Co. is a Kent, WA digital marketing and AI automation agency helping local service businesses grow online. We specialize in website design, local SEO, AI chatbots, Google Ads, and workflow automation...
Split Screen Media is a content-first digital marketing agency based in Southeast Missouri, specializing in short-form video production and social media content for small to medium-sized businesses. We help local business owners show up consistently online without adding another job to their plate. From...
Big Ben SEO is a UK-based SEO agency specializing in performance-driven search engine optimization that helps businesses improve online visibility, attract qualified traffic, and generate sustainable organic growth. The agency delivers tailored SEO strategies that combine technical expertise, content...
Marketing Designed for Your Business. More Clients. More Growth. Less Stress.
Donau Marketing is a full-service marketing agency in Charlotte, NC, combining WordPress web design, SEO, AEO, GEO, advertising, branding, and CRM automation with business consulting. We work with startups, independent professionals, and established companies, offering individual projects and ongoing support...
GrowMera is a digital marketing and business growth company helping businesses build stronger acquisition and conversion systems through strategy, B2B lead generation, SEO, paid media, website development, social media, motion graphics and Mera AI...
Upjen is a digital growth agency based in Istanbul. We started out serving businesses in Izmir and have since moved our operations to Istanbul, working with brands across Turkey...
Marketing for time-poor business owners. We partner with you to develop strategic marketing action.
At Slight Edge Marketing, we are your dedicated marketing agency and consultants. We understand the challenges faced by business owners juggling multiple responsibilities and seeking a competitive edge in the digital age...
Data Driven Digital Marketing That Acquires Sales Fast
The Warriors Code #BeTheWarrior is a movement created by Business Warriors that is changing the world through a new kind of cutting-edge marketing and sales strategy. Passionate about helping people create things that matter, we impact the lives of our community every day by showing them how to create...
EZWebOne is a web design and digital growth agency helping businesses turn their websites into measurable growth tools. We design fast, conversion-focused websites and support them with SEO, CRO, and automation strategies that attract, engage, and convert the right audience. Our approach combines clean...
Mauawiyah Digital Marketing is a UK-focused consultancy delivering evidence-based digital marketing strategies for small and medium-sized businesses. Led by a Dr Mauawiyah Hussan, Doctor of Business Administration, the consultancy combines academic research with practical execution across SEO, Google Ads...
Data-Driven Digital Marketing & Performance-Focused SEO Agency
Vayes is a full-service digital marketing agency dedicated to turning online presence into measurable business growth. We specialize in performance-driven SEO, ROI-focused PPC management, custom web development, and advanced analytics. By combining technical precision with market strategy, we help brands...
More Plumbing Leads. More Booked Jobs. Less Marketing Stress.
You're not in the marketing business. You're in the plumbing business. We make sure you never have to become a marketing expert just to keep your schedule full. Our team builds complete plumbing lead generation systems using SEO, paid ads, AI automation, websites, CRM, email marketing, and review generation...
Websites built to earn trust and turn visitors into customers.
Genial Up is a web design studio helping home service businesses build a stronger online presence. We create fast, conversion-focused websites that make companies look credible, explain their services clearly, and turn visitors into qualified leads. Every project is custom-built, mobile-friendly, SEO-ready...
At GCC Technologies, we transform your brands vision into measurable marketing success. Driven by our core principlesGrowth, Conversions, and Communicationwe help businesses of every scale achieve sustainable results through data-backed strategies that strengthen long-term brand value...
Tantsoft is a full-service digital agency providing software development, web and mobile applications, design, hosting, and digital marketing solutions. Focused on innovation and scalability, the company helps businesses build strong digital foundations and grow in a competitive online environment...
Boost your online presence with Search Engineers, a leading digital marketing agency specializing in SEO, PPC, social media, and content marketing. Drive traffic, increase conversions, and grow your brand today!...
Routz and Beyond is a results-driven marketing and advertising agency specializing in outdoor advertising, branding, and digital growth strategies. We help businesses build strong visibility, attract the right audience, and increase sales through impactful campaigns and creative storytelling. From...
Digital Marketing , Website Development and App Development Company
Slash TechnologiesSlash Technologies offers comprehensive digital and IT solutions to businesses of all sizes, empowering them to achieve sustainable digital growth. Our services include website design, mobile app development, digital marketing, social media management, paid ads campaigns, and cust...
Cinematic Video Production That Makes Brands Visible
Cinesta is a Surat-based video production company creating cinematic films and visual content for brands across India. From corporate films, commercials and brand films to product videos, industrial films, documentaries and digital content, we manage the complete production journey from concept to final...
What should you consider before contacting advertising agencies?
Before contacting ad agencies, you must define your priority business objectives, success metrics, ad spend limit, expected timeline, internal decision-maker, and available resources.
Without that foundation, agencies will make different assumptions, which can make proposals difficult to compare and lead you to hire agencies for the wrong problem.
With 71% of CMOs reporting that they lack the budget to fully execute their strategy, it is vital to distinguish between "must-have" and "nice-to-have" campaign features before the first discovery call.
When should you hire a specialist advertising agency vs. a full-service digital marketing agency?
Hire a specialist advertising agency when you are experiencing issues with paid media execution and results. Conversely, hire a full-service digital marketing agency when the larger problem is coordination across channels, brand, content, and web.
Consider specialized ad agencies when:
Paid search, paid social, or media buying is your growth lever, but performance is inconsistent.
You already have brand, web, and content support in-house.
You need faster testing, tighter optimization, and deep platform expertise (e.g., Google Ads and paid media).
Consider full-service digital marketing agencies when:
Your message, funnel, creative, and channel mix need to work together.
You want one partner for different marketing services, such as social media, search engine optimization, email marketing, and performance marketing.
The primary issue is fragmented execution and not just ad performance.
How much should you realistically budget for advertising?
A realistic advertising budget typically ranges from 5% to 15% of your total annual revenue, depending on your growth stage and industry competitiveness.
For example, small businesses typically dedicate 2%-4% of their revenue to PPC advertising, with aggressive, growth-stage organizations typically spending more.
As a market benchmark, Gartner's 2025 CMO Spend Survey found CMOs reporting marketing budgets at 7.7% of company revenue and paid online channels accounting for 69% of digital spend.
The practical takeaway is to ask each shortlisted agency for a minimum viable testing budget by channel, then reject plans that cannot generate enough volume to prove or disprove the strategy.
How should you measure the success of your advertising campaigns?
Measure the success of your advertising campaigns by tracking bottom-line outcomes.
For lead generation campaigns, success metrics may include qualified leads, cost per sales-qualified lead, close rate by source, and pipeline contribution.
For eCommerce brands, success metrics to consider include customer acquisition cost, contribution margin, repeat purchase behavior, and return on ad spend (ROAS).
While platform metrics, such as click-through rate (CTR) and cost per click (CPC), are valuable, consider these as diagnostic metrics rather than success metrics.
How long does it take to see the results of your advertising campaigns?
Advertising campaigns may produce results within a few weeks or days. However, sustained ad performance may take 1-3+ months.
Typically, ad agencies dedicate the first 30 days to campaign ramp-up, data gathering, experimentation, testing, and conversion lag.
Then, they allot days 31-60 for campaign optimization. After 90 days from the campaign launch, you may record tangible outcomes, such as increased leads, higher ticket sales, and revenue growth.
The actual timeline before you see results will depend on current performance, ad channel, ad quality, target niche, industry competition, and the aggressiveness of your advertising campaign.
What common mistakes do businesses make when choosing their ad agencies?
Common mistakes include choosing based on the lowest hourly rates, being overly influenced by the pitch, and failing to confirm ownership of accounts, data, and reporting.
To avoid these mistakes, look for data-backed case studies that match your industry, market niche, and campaign type.
Also, review client feedback and request client references to better understand the agency's project management style, account ownership practices, reporting standards, and approach to campaign optimization.