While browsing the web, Internet Explorer stores information about the websites you visit, and information that you're frequently asked to provide (for example, your name and address). This information includes Temporary Internet files (Browsing Cache), Cookies, and the History of the websites you've visited.
Usually, it's helpful to have this information stored on your computer, because it can improve web browsing speed, save the traffic (by re-using stored files), or automatically provide information so ...