A cookie is a small text file that is sent by a website to your computer or mobile/tablet where it is stored by your web browser. A cookie contains limited non-personal data, usually a unique identifier and the name of the site. This enables a website to recognise you as you move around the site and/or each time you revisit. Cookies are used for a wide variety of purposes such as to keep you logged in or to remember what's in your basket if you're shopping online, to remember your preferences and settings, to analyse how the site is used by you, and to serve advertising to you.
Cookies which are served by the website you are visiting are called "first party cookie". If they are served by another web-site providing services to that website, such as an analytics company or advertising network then they are called "Third party cookies". They will either be stored for the duration of your visit called a "session cookie" or they might remain for a fixed period, which could be months or even years, to remember you across multiple browsing sessions (known as a "persistent cookie").
NOTE:For more information on cookies and privacy, please visit the UK Information Commissioner's Offce web-site at: