Cookies are text files containing small amounts of information which are sent to your browser and stored on your computer, mobile phone or other device when you visit a website. The cookies send information back to the originating website or another website that recognizes that cookie.

Cookies can be permanent (these are known as persistent cookies) where they remain on your computer until you delete them, or temporary (these are known as session cookies) where they last only until you close your browser. Cookies can also be first-party cookies which are those set by the website which is being visited, or third-party cookies which are set by a website other than the one being visited.

More information HERE