Yes, gambling sites provide us with server seeds that can be verified.
But how do we really know that these seeds are used in actual gambling process?
Isnt it possible they are just displaying server seeds and hashes that we can verify but in reality the server seeds they are using in the back-end functions of the game are actually different/rigged?
Showing seeds is a great plus for me when i do play some games which is usually on dice sites and other games which do have this kind of verification of bets. I think they are provably fair as seeds and hash can be seen randomly generated which means they arent manipulated in each time you do make a roll but for other games i dont really much have an idea.