What is a cookie?
A cookie is a piece of code containing information that a website puts on your computer that will help the site recognize you when you return, and customize your experience accordingly. For example, it can tell the site that you are a legitimate member, and not a bot.
It can tell the site that you have purchased an item and thus give you access to your purchased materials, or what free items you signed up for and are entitled to download or access.
How to delete and control cookies
You may easily opt out and clear all the cookies on your computer using settings in your browser. Go here to see how to do this: https://www.aboutcookies.org/how-to-control-cookies/