A cookie is a small text file that is sent to your computer’s hard drive when you visit a website. A cookie typically contains the name of the website from which it has come, the lifespan of the cookie and a value. The value is usually a unique code that will only make sense to the website that has issued it. Cookies can also be used to measure how people use websites and what kind of browsers or devices they’re using.
You can set your web browser to accept or reject cookies, or tell you when a cookie is being sent. You can also delete cookies from your computer. The AboutCookies.org website tells you how to control and delete cookies on most browsers.
How to control cookies (AboutCookies.org, external website)
How to delete cookies (AboutCookies.org, external website)