I’d say the most useful features depend on what someone actually wants from a casino. Some people will care mainly about the number of games, while others may prefer simple navigation or a good mobile experience. I usually notice how quickly I can find a particular category because that tells me quite a lot about how the site is organised. Bonus sections, game filters, and clear information can also be helpful. None of these things are essential on their own, but together they can make browsing feel much easier and more enjoyable.