What are cookies? Cookies are small text files with information stored on your computer (or other device you use to access the website) when you visit a website. A cookie will typically contain the name of the site that the cookie came from, how long the cookie will be stored and a number (usually a randomly generated unique number). Cookies are used to make websites work more effectively but also to provide certain information to the owner of a website. Cookies make it possible to distinguish different users from each other, which can give each user a more personalized and positive experience of the website.