Delivering online services sometimes involves placing small amounts of information on your computer or device in text files known as cookies. They are widely used in order to make websites work, or work more efficiently.
Cookies are generally set by the website you are visiting (first-party cookies) but if the website has included content from an external resource, such as a Google map, cookies can be set from the origin of the content (third-party cookies).
Session cookies do not have an expiry time set when they are created and are deleted once the browser is closed. However, persistent cookies remain on your computer or device until their expiry time is reached.