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Cookies are small text files that are placed on your computer by websites that you visit. These text files can be read by these websites and help to identify you when you return to a website.
Cookies can be “persistent” or “session” cookies. Persistent cookies remain on your computer when you have gone offline, while session cookies are deleted as soon as you close your web browser.
There are two main kinds of cookies: session cookies and persistent cookies.
Session cookies are deleted from your computer when you close your browser, whereas persistent cookies remain stored on your computer until deleted, or until they reach their expiry date.
You can block cookies by activating the setting on your browser that allows you to refuse the setting of all or some cookies. Below are links to the 'Help' pages of major browsers which explain how you can do this: