CookiesA cookie is a file containing an identifier (a string of letters and numbers) that the web server sends to the web browser and is stored by the browser. The identifier is then sent back to the server whenever the browser requests a page from the server.
Cookies can be either "persistent" cookies or "session" cookies: a persistent cookie will be stored in the web browser and will remain valid until a specified expiration date, unless it is deleted by the user before the expiration date. Session cookies expire at the end of the user's session when the web browser is closed.
Cookies usually do not contain any information that personally identifies the user, but the personal information we store may be linked to information stored in cookies and obtained from them.