Doing squats daily can help you get a bigger bum but you should also add weight lifting to the exercise along with doing the squats.
Because weight lifting also helps your glutes grow by adding resistance so if you want a bigger bum you should certainly add weight lifting to your squatting exercises and you should see a bigger bum within 6 months.
Doing squats also helps build leg muscles as well so it's a win win and also helps aid your digestive system.