When it comes to most games I do not think any kind of tutorial is needed since the rules of the game are simple enough however when it comes to sports bets I have always thought that casinos do not do enough to explain what they mean, for the most part I found myself looking for websites that explain each bet on detail and what it meant and I do not think this should be necessary at all since the casino should offer and explanation of their betting options themselves and yet this is something that I often find lacking in most casinos.
Well, I think even if not needed the casinos will still put some tutorials on their site so people would be aware to the rules and what's the winning or losing side of the games and as well as the mechanics. On sports betting there's always a description on where you want to put your bet like and I think sports betting is easy to determine if you're reading those descriptions/details that mostly below of it.
I tend not to use the sites tutorials since I know there are other ways to learn it and there are too many articles, videos, infographics, etc., that are available now on the web. It's always better to find more sources of learning when it comes to sports betting, of course, sports betting and DYOR always comes hand-in-hand.