Cookies are basically tiny files that websites send to your device. They're used to keep track of stuff like what's in your drafts or your login info. You've probably seen those cookie notices all over the internet—they're meant to be transparent about how your privacy is being handled. When you agree to accept cookies, you're allowing the website to use them. This isn't always a bad thing as cookies can be quite useful for various things, like saving your email and login information, saving your payment account, filing history, etc.
If you reject the cookie tracking, sometimes, the website won’t work