What Are Cookies in Web Browsers?
Websites record information in the form of cookies on your computer. Cookies contain only text and no other information.
Text may be a user ID, a session ID, or anything else. For instance, a web page can be designed to provide a link that conceals particular page elements. This page can use cookies to save your preferences on your computer. When the page is reloaded, it can check for cookies and automatically hide components.