How do cookie policy works?

Question

I know what cookie is in tech world but don't know how it works? So please let me know is it only AI or something else

Answer 1

It's just a bit of text.

When you visit a website and for example log in, the site you are visiting sends back a HTTP resonse. In the HTTP headers there will be a

Set-Cookie: session=ABC123;lang=en

for example.

From then on, everytime you visit that website, your browser will send a HTTP header in the HTTP request:

Cookie: session=ABC123;lang=en

And the server can use it to identify you (to make sure you stay logged in).

That's all there is to it.