Cookies are a kind of short-term memory for the web. They are stored in your browser and enable a site to ‘remember’ little bits of information between pages or visits. Cookies can be used by web servers to identify and track users as they navigate different pages on a website, and to identify users returning to a website. Cookies may be either “persistent” cookies or “session” cookies. A persistent cookie consists of a text file sent by a web server to a web browser, which will be stored by the browser and will remain valid until its set expiry date (unless deleted by the user before the expiry date). A session cookie, on the other hand, will expire at the end of the user session, when the web browser is closed.