Google’s marketing technology stack gives advertisers and analysts a connected set of tools for planning campaigns, measuring results and optimising spend. It includes Google Ads, Google Analytics, Google Tag Manager, Looker Studio, Search Ads 360, Display and Video 360, Campaign Manager 360 and related products. Together they support search, display, video and mobile advertising, along with measurement across the customer journey. Because the tools are powerful and interconnected, many brands depend on agencies and holding companies that specialise in using them.
This guide from Software Outsourcing Journal introduces five major companies widely associated with Google’s marketing tools. If you are exploring analytics, advertising and web technologies more broadly, you can also browse our overview of Software Development Technologies.
What the Google Marketing Suite Includes
Google Ads is the most familiar component, allowing advertisers to buy search, display, shopping, video and app campaign inventory. Google Analytics measures website and app behaviour, helping teams understand traffic sources, engagement and conversions. Google Tag Manager simplifies the deployment of tracking tags without constant developer involvement, while Looker Studio turns data into dashboards and reports that stakeholders can understand.
Enterprise advertisers often use Google Marketing Platform, which brings together tools for large-scale media buying, creative management and measurement. Search Ads 360 helps manage search campaigns across multiple engines, Display and Video 360 supports programmatic buying across channels, and Campaign Manager 360 handles ad serving and reporting. Integration across these products allows teams to share audiences, apply consistent measurement and reduce duplicate reporting.
Privacy and measurement are evolving priorities. With stricter data protection rules and changes to third-party cookies and identifiers, companies are adopting consent management, server-side tagging, first-party data strategies and modelled conversions. Agencies with strong technical and compliance knowledge are better positioned to help brands adapt.
Why Companies Use Specialist Partners
Setting up the tools is only the beginning. Value comes from clean data, thoughtful campaign structure, accurate conversion tracking and continuous experimentation. Partners can design measurement plans, implement tagging, connect data warehouses such as BigQuery, build dashboards and manage media across channels. They also bring benchmarks from many accounts, which helps clients set realistic goals.
For smaller businesses, an agency may simply provide expertise that would be expensive to hire. For global brands, it may coordinate teams across markets and ensure that reporting is consistent. In both cases, transparency about fees, ownership of accounts and data access is essential.
How We Selected These Companies
We selected large, well-established organisations known for working extensively with Google’s advertising and measurement products. The list reflects public reputation and scale rather than a formal ranking, and the right partner for you may be a smaller specialist. Partner status and service offerings change, so verify current credentials and references directly.
Top 5 Companies Using the Google Marketing Suite
1. WPP
WPP is one of the world’s largest marketing and communications groups, with agencies covering media, creative, public relations and data. Its media operations manage very large advertising budgets for global brands, and these include extensive use of Google’s buying and measurement platforms. WPP’s scale allows it to combine media planning with creative and technology services. Multinational advertisers that want an integrated partner across markets often work with groups like WPP.
2. Publicis Groupe
Publicis Groupe combines media, creative, data and technology businesses, including agencies and platforms that specialise in digital transformation and performance marketing. It supports clients in building first-party data strategies and running campaigns through Google’s tools, among others. Its emphasis on connecting data, media and customer experience appeals to brands that want a unified approach. Large retailers, financial companies and consumer brands frequently appear among its clients.
3. Omnicom
Omnicom operates a network of advertising, media and marketing agencies and has extensive experience with search, programmatic and analytics platforms. Its media agencies plan and buy across Google properties and other channels, and its data and technology units help clients with measurement and audience strategy. Advertisers that want access to multiple specialised agencies under a single group, each with its own culture and strengths, may find this structure useful.
4. Dentsu
Dentsu is a global advertising and media network with strong positions in Japan and international markets. It provides media buying, analytics, creative and customer experience services, and it works with Google’s platforms for planning and optimisation. The group has invested in data and technology capabilities, which supports clients that need cross-channel measurement. Companies seeking a partner with strong Asia-Pacific presence in addition to global coverage may include Dentsu on a shortlist.
5. Merkle
Merkle, part of Dentsu, is a data-driven customer experience and performance marketing company. It is particularly known for combining analytics, customer data platforms, personalisation and media services, and it has deep experience with Google’s marketing and analytics products. Its technical orientation makes it a strong candidate for projects such as measurement redesign, tagging implementation and data integration. Brands that want to connect advertising data with customer relationship management and loyalty systems often evaluate Merkle.
How to Choose a Google Marketing Partner
Define objectives before inviting proposals. Are you trying to grow acquisition, improve return on ad spend, build a measurement framework, migrate analytics or consolidate reporting? The answer determines whether you need a media buyer, a technical implementation specialist or a full-service agency.
Verify certifications and experience. Google offers certifications for Ads, Analytics and Marketing Platform products, and agencies can earn partner recognition. These are useful signals, but also ask for case studies and speak to clients in your industry.
Insist on account ownership and transparency. You should own your advertising accounts, analytics properties and data, with admin access for your team. Request clear reporting on fees, media spend and performance, and understand how the agency is compensated, whether through a percentage of spend, a flat fee or performance incentives.
Check technical depth. A good partner will discuss conversion tracking, attribution models, consent mode, server-side tagging, data layers and warehouse integration, not just creative ideas and bidding strategies. Ask how they validate data accuracy and how they handle privacy requirements in your markets.
Best Practices for In-House Teams
If you manage the tools yourself, document your tagging plan and naming conventions so reports remain consistent. Audit conversions regularly to avoid double counting or missing events. Use experiments to test bidding strategies, creative and landing pages, and keep a record of lessons. Build dashboards that answer business questions, not just display every metric available.
Frequently Asked Questions
Is the Google Marketing Suite only for large companies?
No. Many tools, including Ads, Analytics and Tag Manager, are accessible to small businesses, while enterprise platforms are aimed at large advertisers with complex needs.
Do we need a data warehouse?
Not at first, but as data volume and reporting needs grow, a warehouse such as BigQuery can unify sources and support advanced analysis.
Measurement and Privacy in a Cookieless Era
Marketing measurement is changing as browsers restrict tracking and regulations expand user rights. Companies should implement consent management that respects user choices and passes consent signals to Google tools. Server-side tagging can improve data control and page performance, while enhanced conversions and modelled data help fill gaps. First-party data, such as authenticated customers and email subscribers, becomes more valuable, but it must be collected transparently and stored securely. Combine platform reporting with incrementality tests and marketing mix modelling to avoid over-crediting any single channel. Document your tracking plan and review it whenever the website changes. Agencies that understand both advertising and privacy engineering can help brands stay compliant without losing visibility into performance, which is quickly becoming a decisive capability for modern marketing teams.
Final Thoughts
Google’s marketing tools can drive measurable growth when they are implemented well and managed by capable teams. WPP, Publicis Groupe, Omnicom, Dentsu and Merkle represent large-scale options with different strengths in media, data and technology. Match the partner to your size, goals and technical needs, and keep control of your accounts and data. For more research, visit Software Outsourcing Journal and explore our Software Development Technologies resources.