system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 what the hell are cookies and why do websites want me to enable?
gpt
Imagine a website is like a hotel. The hotel wants each returning guest to have their room personalized to their requests each time they visit. They have millions of guests so instead of keeping a list of what everyone likes in a huge book, they write the guests requests on their foreheads. That way, there is no confusion and there is no need to identify everyone in a huge database. When a guest returns, they instantly know what they want without even asking.