Authentication cookies are a special type of web cookie used to identify and verify a user after they log in to a website or web application. What They Do:Once you log in to a site, the server creates an authentication cookie and sends it to your browser. This cookie:Proves to the website that you’re logged inPrevents you from having to log in again on every page you visitCan persist across sessions if you select “Remember me”What’s Inside an Authentication cookie? Typically, it contains: