Server-Side Tracking.

Server-side tracking (SST) moves the analytics data collection from the user's browser to the server. Instead of a browser-side JavaScript tag sending events to Google Analytics or Meta, the website's server processes the event and sends data directly to analytics and advertising platforms. This bypasses browser-based ad blockers, browser privacy restrictions, and iOS tracking limitations that prevent client-side tags from firing.

Implementing Server-Side Tracking

Google Tag Manager supports server-side containers that act as a proxy between the client and analytics/ad platforms. When implemented correctly, the client-side GTM container sends minimal data to your own server-side container (on your domain, so not blocked by ad blockers), which then forwards enriched data to multiple platforms. This also improves page performance by reducing the number of third-party requests from the browser.

When Server-Side Tracking Is Worth the Investment

Server-side tracking requires additional server infrastructure and technical implementation effort. It's most valuable for: businesses with high ad blocker usage in their audience (typically tech-focused or privacy-conscious demographics, where 30-50% of users block client-side tags); businesses heavily reliant on Meta advertising (where iOS privacy changes caused significant signal loss); and e-commerce businesses where accurate conversion tracking directly impacts ad optimisation.