GA4 and Google Tag Manager
Decisions are only as good as the data
It is common to find GA4 properties counting the wrong things: duplicate conversions, missing form submissions, internal visits or tags firing before anyone has given consent. The result is reports nobody trusts and budget decisions made on guesswork.
We plan what should be measured, build it cleanly in Google Tag Manager, configure Consent Mode v2 with your cookie banner and connect GA4 to Google Ads and Search Console. Then we document it, so your tracking does not fall apart the next time someone edits the website.
Who it’s for
Do you need help with GA4 and Tag Manager?
- Businesses unsure whether their GA4 conversions are accurate
- Advertisers whose Google Ads and GA4 figures do not match
- Websites where tags may fire before cookie consent is given
- Teams with a messy Tag Manager container nobody wants to touch
What’s included
What our GA4 and GTM service includes
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Tracking audit
A review of your GA4 property, Tag Manager container and consent setup, showing what is broken, missing or double counted.
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Measurement plan
Agreeing which actions matter, such as forms, calls, bookings and purchases, and how each will be tracked and named.
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Tag Manager build
Clean, documented tags, triggers and variables for enquiries, clicks, calls and ecommerce events.
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Consent Mode v2
Integrating your consent platform so advertising tags wait for consent, and Google tags adjust to each visitor's choice.
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Ads and Search Console integration
Linking GA4 with Google Ads and Search Console, importing conversions and setting up enhanced conversions where appropriate.
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Documentation and handover
A plain-English record of what is tracked and how, so your team or future agencies can maintain it.
Our approach
How we work
Diagnose first, then prescribe.
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Audit
We review what is installed, what fires when, and whether consent is respected.
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Plan
We agree a measurement plan built around your commercial goals.
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Build and test
Tags are built in a Tag Manager workspace and tested before publishing.
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Document and support
We hand over documentation and keep tracking checked as the site changes.
Why OMS
Why businesses choose us
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Built by people who use the data
Our PPC and SEO teams rely on this tracking every day, so we build it to answer commercial questions.
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Privacy built in
Consent Mode v2 and consent-aware tag firing are part of every build, not an afterthought.
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You own it
Accounts and containers stay in your name, with documented access, so you are never locked in.
The proof
Recent work
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- Paid Media
- SEO
- AI
3x
Return from Google Ads, on a smaller budget
Non-Stop Kids Entertainment
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- Websites
- SEO
- Paid Media
3x
Turnover since the new website, SEO and PPC
Mac’s Truck Sales
FAQs
Questions we get asked
Can’t see your question? Give us a call.
01543 899 617
What is Consent Mode v2 and do we need it?
Consent Mode v2 passes each visitor's cookie choices to Google tags, which then adjust how they collect data. Google requires it for advertisers using its ad platforms with UK and EEA users who want to keep using audience and remarketing features. It works alongside a proper consent banner, not instead of one.
Does Consent Mode make our tracking compliant?
Not on its own. It passes choices on; it does not collect consent. Under PECR, as amended in 2025, some analytics cookies can be set with clear notice and an easy opt-out, but advertising and tracking cookies still need prior consent. Your banner must make rejecting as easy as accepting, with nothing pre-ticked.
Why do Google Ads and GA4 show different numbers?
They count differently, with different attribution models, time windows and consent effects. Some difference is normal. Large gaps usually point to duplicate tags, missing conversions or misconfigured imports. We find the cause and explain which figures to rely on for which decisions.
Can you fix our existing Tag Manager container?
Yes. We audit what is there, remove duplicate or broken tags, rename things so they make sense and rebuild where needed. Changes are tested before publishing, and previous versions are kept so anything can be rolled back.
Who owns the GA4 and Tag Manager accounts?
You do. We work inside accounts owned by your business, with access granted to us, so your data and setup stay with you whoever manages them in future.
Ready to Generate More Leads, Sales & Customers?
Let’s diagnose what’s holding your business back and show you exactly how to move forward.