Differences between session and persistent cookies
There are two types of cookies placed during a website visit. These are called session and persistent cookies.
Session cookies are set at the start of a visit and remain active only while that visit continues. They primarily support navigation through the site as they remember which pages you have been on and what interactions you may have had with the site already (e.g. putting items in a shopping basket). These cookies are normally deleted automatically when you close your browser.
Persistent cookies are set during a first visit to a site but will carry an expiry date or time. This cookie will remain on your device until either you clear your cookies or the expiry is reached. They can be used for analytical purposes to track visits over time, for example we could see how many people visited a particular page and then came back to view it again later.
Neither of these types of cookies is used to collect or share personal information.