A cookie is a piece of web technology used within your browser to store information while you are not on the website. It keeps your login session or token and stores information that advertisers and other services like Facebook use to track you across the Internet.
Cookies are one of the older web technologies still in use because they are embedded across the web and can be quite helpful. For example, if you want to use your website today and say that you accept to remain logged in, the cookies help you maintain sessions and remain logged in next week while also retaining some core information.
