tracking
Pixel
Tracking code on the merchant's confirmation page that signals your commission to the network.
What is Pixel?
A pixel is a piece of tracking code placed on a merchant's confirmation page that fires when a conversion occurs, sending a signal to the affiliate network to credit a commission to the referring affiliate.
Pixel In Practice
Pixel-based tracking is the legacy method for recording affiliate conversions, and in 2026 it is the least reliable of the three main tracking approaches. Pixels fire inside the visitor's browser — meaning they are blocked by ad blockers, restricted by privacy settings on Safari and Firefox, and can fail when users navigate away before the pixel completes loading. Server-to-server (S2S) postback tracking is the more reliable alternative, recording conversions server-to-server with no browser dependency. For affiliates, programs relying exclusively on pixel tracking lose conversion attribution for a growing percentage of traffic as privacy-first browsers gain market share. Ask the affiliate manager whether the program uses pixel-only or S2S tracking — the answer determines how much of your referred traffic is accurately attributed.
Example of Pixel
An affiliate promotes Bluehost through a content site. Bluehost's program uses a pixel on the confirmation page. A visitor clicks the affiliate link on Safari on iPhone, completes a hosting signup, but Safari's Intelligent Tracking Prevention has already restricted the tracking cookie. The confirmation page pixel fires but cannot link back to the affiliate's click because the cookie context is lost. The commission is not credited. The same conversion on desktop Chrome — where the cookie persists — would have credited the commission. This is the real-world gap that pixel-only tracking creates as privacy-first browsers grow.
Related Tools & Services
- Bluehost Affiliate Program — Example illustrating pixel tracking attribution loss on privacy-first browsers