Cookies are small pieces of text sent by your web browser by a website you visit. A cookie file is stored in your web browser and allows the website or a third-party website to recognize you and make your next visit easier and the website more useful to you. Essentially, cookies are a user's identification card for the web server.
Cookies allow websites to serve you better and more efficiently, and to personalize your experience.
Cookies can be "persistent" or "session" cookies.