What It is: Pixel tracking often involves placing a clear graphics file, called a GIF, on a webpage. The pixel doesn’t have to be clear, any element that is on the webpage can be used to track. The invisibility only helps a gif blend seamlessly into the page. The pixel holds information about the device accessing the page and delivers it to the website owner in real time. Pixel tracking has been around since the beginning of the Web, but now some marketers are going back to basic pixel-tracking to get the information that matters most: who is clicking through on ads and ending up on a sales page.