The Facebook Pixel is a tracking code on your website that tells Meta what actions users take after clicking your ads. Accurate pixel data is what Meta’s algorithm uses to find the right audiences and optimise your campaigns. 

Facebook Pixel accuracy issues mean the data reaching Meta is incomplete — so your reported conversions are lower than reality, audiences shrink, and campaign performance suffers. 

Why does accuracy drop?
Browser-based pixels are fragile. Ad blockers stop the pixel from loading. Apple’s Intelligent Tracking Prevention (ITP) limits how long cookies last in Safari. Network issues sometimes prevent the pixel script from running. And iOS 14+ restricts cross-app tracking by default. 

The result:
Meta underreports conversions, retargeting audiences get smaller, and your cost per result rises.  The fix is the Meta Conversions API (CAPI). CAPI sends event data server-to-server — it cannot be blocked by a browser or ad blocker. When used alongside the pixel, it recovers much of the lost data and improves event match quality scores. 

Seers.ai’s server-side tagging helps implement CAPI correctly in a privacy-compliant way — recovering lost conversion signals and improving your overall Meta campaign performance.