A no-jargon guide to setting up marketing tracking properly

If you cannot trust your marketing data, you cannot make decisions with it. Here is a plain-English guide to building tracking that does not lie.

Why dashboards lie

Marketing tracking has three big enemies in 2026: iOS privacy restrictions, cookie consent, and the gap between when an ad is clicked and when revenue actually happens. The default tracking setup most websites have was designed for 2018. It does not work now.

Server-side tagging

Stop sending data directly from the user’s browser to Google, Meta and the rest. Set up a server-side Google Tag Manager container — usually on a subdomain like track.yourdomain.com — and route everything through it. Performance improves, privacy improves, data quality improves.

Consent Mode v2

If you operate in the EU and you have not implemented Consent Mode v2, your Google Ads data is materially worse than it needs to be. Consent Mode lets Google fill in modelled conversions for users who do not consent — recovering 30–50% of the data you are losing.

Enhanced conversions

Pass hashed email addresses (with consent) to Google and Meta’s conversion APIs. This single change typically improves measured conversion volume by 15–25% in iOS-heavy categories.

Offline conversion imports

If you have a sales cycle longer than a week, you need offline conversion imports. Hook your CRM to Google Ads and Meta’s offline events APIs and feed back actual closed-won revenue. The platforms will start optimising for the right humans.

Reconciliation

Once a month, compare your ad-platform reported revenue against your actual ledger. Aim for under 15% discrepancy. Anything more means something in the chain is broken.

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