Analytics & Attribution
Tracking Pixel
Quick definition
A small JavaScript snippet or 1x1 image embedded on a page that fires events back to an ad platform or analytics tool.
What it actually means
Pixels, Meta Pixel, TikTok Pixel, Google Tag, historically powered attribution and audience-building for eCommerce paid media. iOS 14.5 App Tracking Transparency cut pixel coverage. The fix: pair the client-side pixel with server-side events, CAPI for Meta, Events API for TikTok, Enhanced Conversions for Google, so events fire even when the browser blocks them. Deduplication via event_id is critical. Sending the same event from both browser and server without an event_id will double-count.