Cookies are small text files which are stored on your computer or mobile device by a website. This explanation from the BBC further explains What are Cookies?
Blocking and Deleting Cookies
For more information about how to manage cookies, including blocking and deleting cookies please visit www.aboutcookies.org or www.allaboutcookies.org.
Please note blocking all cookies may have a negative impact on the usability of many websites. If you block cookies, you may not be able to use all the features on our website.