A cookie is a small text file that a website requests to save on the visitor’s computer. Cookies are used on many websites to allow a visitor access to various features. The information in the cookie can also be used to track a user’s browsing of websites using the same cookie.
There are two types of cookies. One type saves a file for a long time on the visitor’s computer, then the cookie has an expiration date. For example, it uses features that talk about what’s new since the user last visited the current site last time. When the expiration date is passed, the cookie is deleted when the user returns to the site that created it.
Cookies can be deleted or completely disabled if desired by customizing your browser’s security settings. How this is done varies between different browsers and browser versions but is described if you search on your specific browser’s help page.