Pixel is a snippet of code that is located on the affiliate link or on the pages where sales or transactions are generated. When a user clicks somewhere around the pixel, it is fired, meaning the click ID, sale, or transaction is generated. Consequently, marketers can track or receive notifications when the affiliate link was followed or a sale/transaction happened.
S2S Tracking
S2S Tracking is a term that refers to a tracking method that is based on sending back messages from the advertisers’ system to partner software