php - What kind of encryption method is this?

Question

Recently, I have seen encrypted content in the following format in the URL addresses of many websites:
d0d1eb41-ce63-4f30-98ae-a4cb7ce90d8d
I would like to ask what kind of encryption method this is and the related introduction. ?

Answer 1

Is this a UUID?

Answer 2

This is just a uuid

Answer 3

uuid is an algorithm for generating unique ids, the above is the unique id