The FAQ are frequently asked questions, it is different from ToS or T&C (Terms of Service or Terms and Conditions). The FAQ is short but consists of the questions that users are often asked which may contain many things about the ToS too but not all.
On every site you are registering, be it gambling site or not gambling site, the ToS page would be displayed and you have to scroll down and you have the check ✔️ it that you have read it, but they are always too long which discourage many people to read it. But very important to read.
I know I'm not sure, but I hardly read the entire T&C, I usually pay more attention to the parts that talk about deposits, KYC requirements and limits.
I'd like to know how many players here actually fully read KYC, but I believe that's a topic for another thread with a poll.
The FAQ, on the other hand, is quite attractive for those who want to have a quick and superficial overview of the functioning and main rules of the site, this one I always read and in fact I think it is very valid because it is usually a quick read.
I believe that every site should have a simplified T&C, without too many technical terms and in a summarized way, covering the main and most important topics of the rules.
This document does not need to be legally valid and should not replace the T&C, but it would be very interesting to "facilitate" users' understanding and even make more players aware of the rules before starting to play.