In recent weeks Snapchat has been testing a conversion pixel that allows advertisers to create pieces of code on websites to track specific actions that someone takes after seeing an ad. Advertisers first create a pixel within Snapchat’s ad-buying tool by picking a website to track. For example, a retailer may want to see how many people visited the page on their e-commerce site after someone makes a purchase to measure who saw an ad and then converted on a website.