Google Analytics & Tag Manager Agency

Google Analytics & Google Tag Manager agency.

Unlock the secrets to your marketing success with crystal-clear insights into your prospects’ origins, behaviors, and the true ROI of your campaigns.

10+ yrsmastering data tracking on Meta & Google
< 10 daysdelivery, your tracking in your hands
GA4 + server-sidecertified tracking specialists
Trusted by 200+ brands across Europe
Trusted by performance-focused brands across Europe
Why Donutz

Why choose Donutz Digital for your tracking?

10+ years of expertise

For over ten years, we’ve been mastering the art of data tracking, with deep expertise in supercharging your marketing campaigns on Meta and Google to achieve extraordinary results.

Handpicked specialists

Top-notch tracking specialists who excel in GA4, server-side, HubSpot offline conversion, and offline conversion tracking via Gclid and Fbclid. We’re experts in it all.

Live in under 10 days

Experience lightning-fast delivery, with your tracking in your hands in under 10 days.

Ongoing support

Once we deliver, we don’t just vanish. We’re here to support you every step of the way.

The basics

What is a Google Analytics agency, and why do you need one?

A Google Analytics agency is a strategic partner that specialises in leveraging web data to improve your website performance. These certified experts (Google Analytics Partners) master the platform intricacies to transform raw metrics into actionable insights.

Web analytics goes far beyond simply counting visitors. It reveals user journeys, highlights points of friction, and uncovers opportunities to boost your conversion rate. In a world where traffic acquisition is increasingly costly, optimising your existing audience becomes essential to improving ROI.

The challenge

Challenges of web analytics

With constantly evolving technology and regulations like GDPR, setting up and interpreting Google Analytics now requires deep technical expertise. Companies today face several challenges:

  • Ensuring GDPR compliance and respecting user privacy
  • Managing the complex technical setup of events and goals
  • Interpreting data to support informed decision-making
  • Integrating with other marketing platforms and CRM systems
How we help

How a Google Analytics agency improves your web performance

Advanced setup & configuration

A specialised agency begins with a thorough audit of your current implementation, identifying gaps and weaknesses in your tracking. It then sets up:

  • Precise conversion tracking, tailored to your business objectives
  • Custom events to measure key user interactions
  • Audience segmentation for deeper user analysis
  • Real-time dashboards customised to your KPIs

In-depth behavioral analysis

An agency expertise shines through in its ability to analyse user behavior. It helps you identify:

  • High bounce-rate pages, and why they underperform
  • The most effective conversion paths
  • Traffic sources with the highest ROI
  • Drop-off points in the sales funnel

Continuous performance optimisation

Beyond analysis, the agency delivers concrete recommendations to optimise your marketing KPIs:

  • A/B testing to improve key elements of your site
  • Campaign segmentation for high-precision targeting
  • Marketing attribution models to measure channel impact
  • Predictive analytics using GA4 machine learning features
The upside

The tangible benefits of working with a Google Analytics agency

Technical expertise & time-saving

Collaborating with certified Google Analytics specialists saves you valuable time. These experts stay up to date with GA4 latest features and can quickly identify improvement opportunities you might otherwise overlook.

Measurable ROI & enhanced performance

A Google Analytics agency helps you:

  • Increase your conversion rate through a better understanding of user journeys
  • Optimise ad spend by identifying the most profitable channels
  • Enhance user experience by analysing browsing behavior
  • Make data-driven decisions based on reliable insights

Tailored strategic support

Every business has unique goals. A specialised agency adapts its methodology to your industry and challenges, helping you:

  • Define relevant KPIs aligned with your business goals
  • Foster a data-driven culture within your team
  • Anticipate market trends using data
  • Scale your most effective marketing actions
Privacy

GDPR compliance & web analytics: balancing performance & privacy

The introduction of GDPR did not end web analytics, it reshaped it. A seasoned Google Analytics agency helps you:

  • Implement tracking setups that comply with regulations
  • Configure appropriate consent management
  • Deploy alternative solutions when necessary
  • Maintain data quality despite privacy constraints
Choosing a partner

How to choose the right Google Analytics agency

When selecting a partner to help you succeed, make sure the agency has:

  • Up-to-date Google Analytics certifications
  • Industry experience relevant to your sector
  • Client references with measurable results
  • A collaborative approach that includes training and knowledge transfer
Our process

Stop wasting money: invest in effective website tracking today.

Unlock your true potential.

Initial audit

We start with an initial audit to evaluate your tracking and discover potential improvements and opportunities.

Tracking plan & setup

We create a tracking plan and use Google Tag Manager to set up Google Analytics for your website.

Server-side tracking

We assist you in tracking more efficiently using GTM server-side.

CRM & offline conversions

We help link your CRM and bring offline conversions into Google Ads and Meta.

Investing in a Google Analytics agency is a growth lever, not a cost.

Hiring a specialised Google Analytics agency is more than just a service cost, it is a strategic investment. It helps you unlock the full potential of your digital presence, improve ROI, and stay compliant with new data privacy standards.

Ready to turn your data into growth opportunities?

Contact our team of certified Google Analytics experts for a free audit of your current setup, and discover how we can help you drive performance through better data.

Testimonials

What CMOs and CEOs say about working with us

Real partnerships. Real accountability. Results that move the needle.

“The Donutz team is highly professional and hands-on in its approach. Decathlon Ireland took a fully digital approach to our opening strategy, and its success was certainly strengthened by Donutz expertise in digital marketing.”

Sean, Decathlon
Sean – CMODecathlon

“Thanks to Donutz Digital work, the client saw revenue growth from its advertising campaigns. The team provides strategic support on a global scale and daily assistance from specialists. Donutz Digital shows strong adaptability and impressive project management.”

Q
Quentin – CMOPoupette St Barth
Other services

Explore our other services

Questions about tracking

Frequently asked questions on tracking

Everything you need to know about Analytics, Tag Manager and server-side tracking.

Why implement server-side tracking?
Server-side tracking helps restore the reliability of your data in a digital ecosystem where traditional client-side tracking is increasingly limited. Modern browsers like Safari and Firefox, as well as ad blockers, are blocking more and more third-party cookies, external scripts, and even tools like Google Analytics. As a result, you lose valuable data, leading to skewed reports, unreliable conversion tracking, and inaccurate attribution. By switching to server-side tracking, events (such as purchases, form submissions, or add-to-cart actions) are sent directly from your server, instead of the user browser. This lets you bypass many client-side restrictions while maintaining compliance with privacy laws like GDPR and ensuring proper user consent. It is a more modern, secure and stable approach that gives you full control over your marketing data.
What are the benefits of good tracking with Analytics / Tag Manager?
Think of tracking as your marketing GPS: without it, you are operating in the dark. With a well-configured tracking setup, you gain deep insights into user behavior, conversion paths, and the true performance of your campaigns. You can understand why users convert (or do not), which channels bring the best ROI, and how to optimise each step of your funnel. It is no longer about guesswork; it is about data-driven decisions that let your team test, learn and improve continuously. Good tracking empowers your marketing, growth, product and sales teams to move in sync and make smarter decisions at every level.
Do you provide recommendations based on the collected data?
Yes, and this is one of our strongest value-adds. We do not just deliver data, we interpret it and translate it into actionable insights. Whether it is campaign performance, website optimisation, or funnel analysis, we help you make sense of what is working and what needs improvement. In our ongoing collaboration (monthly reports or agile sprints), we analyse performance and provide clear, strategic recommendations: where to invest, what to test, what to optimise. We act as a true partner, not just a technical service provider.
What does the setup process for Analytics / GTM look like?
It all starts with a thorough audit of your current setup and business goals. We identify key actions and events to track, understand your conversion funnels, and map out which platforms you need to integrate (CRM, CMS, ad platforms, etc.). Next, we deploy Google Tag Manager on the client side, and optionally on the server side via a server container. We integrate Google Analytics 4 or any other relevant tools (Meta Pixel, Google Ads, LinkedIn Insight, etc.), ensuring each event is properly defined, documented, triggered and tested. We debug and validate everything with your team, to deliver a clean, reliable, goal-driven tracking setup.
Is this setup compliant with GDPR and privacy laws?
Yes. We take data privacy and legal compliance very seriously. All tracking solutions we implement are designed to be 100% compliant with GDPR and ePrivacy regulations. This includes proper consent management using CMPs, data minimisation, IP anonymisation, and controlled data sharing with third parties. In fact, when properly implemented, server-side tracking often improves compliance, as it gives you more control over what data is collected and shared, and how.
Still have a question?We’re happy to help.
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