Describe this technique as fully as possible, and cite your sources so others can research. Try not to duplicate a method already mentioned by another student.

Persistent Cookies

Make a post describing a technique that search engines and websites use to track identities. For example the use of Zombie Cookies or archiving search terms.
Describe this technique as fully as possible, and cite your sources so others can research. Try not to duplicate a method already mentioned by another student.
DO NOT try to solve the problem you’ve identified in your post.