Web tracking is a way for websites to unlock information about your visits and activities while you are online. Websites use special software to collect information about the pages you visit, the links you click, how long you stay on a certain page, and how often you come back. All of this information is then stored in a database and can be used to customize your experience when visiting again. This means that when you come back to the website, it can show you things related to what you like and have already looked at, or target you with specific ads.