What are some things I might not know about online casinos?

Hi everyone! I’ve recently been curious about online casinos, but I feel like there’s a lot I don’t know. I’ve seen advertisements and heard people talk about games and bonuses, but I’m sure there’s more to it. Can someone share some insights or things that aren’t obvious to a beginner? I’d love to learn about tips, features, or even fun facts that people don’t usually mention. Thanks in advance!