What is server-side tracking, and why is it so effective at bypassing ad-blockers and browser protections?

Instead of the browser sending data to trackers, the website's own server forwards data directly to third parties (Facebook, Google) — so client-side blockers never see it.

* Moving tracking server-side (Conversions API) evades client-side blockers that catch the Facebook Pixel. *

How it works:

• Data goes from the web server directly to third parties, with the server acting as an intermediary
• No processing in the user's browser — so there's no request for an ad-blocker or tracking-prevention to catch

Advantages (for trackers):

• Far less susceptible to ad-blockers and browser tracking-prevention
• Higher data quality and full control over what's transmitted

Real examples: the Facebook Conversion API, and e-commerce platforms like Shopify that integrate such APIs directly — conversion data is sent to Facebook automatically, even when the user runs an ad-blocker.

This is the structural reason the cookie's death doesn't end tracking: moving collection server-side removes it from the browser, where almost all user-controlled defenses live.