What exactly are cookies that you get to/have to agree or disagree with on websites and how do they work?
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A cookie is a small piece of information that the webpage wants to save to your browser so that it can repeat something the next time you visit. For instance, turning on dark mode as a preference saves that as a cookie, and the next time you visit, it can see that you turned it on last time and turn it on for you automatically.
The controversial aspect is that some cookies are used to track your movement across the internet. Facebook famously uses tracking cookies on every website that has a “log in with Facebook” option. From Facebooks perspective, they can use this information to see who is accessing their account from which sites. It can also check for cookies added by other affiliated sites to know that you were on a different page before this, and can use that information to target you with more relevant ads
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