Online casinos offer a large variety of games. You can choose from hundreds of versions of popular games, including blackjack, roulette, poker, scratch cards, and progressive slots. Online casinos also offer a variety of free games that allow you to practice your skills before you play with real money. This can be a great way to learn new skills and improve your strategy before playing for real money. Once you've mastered the basic principles of playing games in an online casino, you'll be ready to move on to higher levels.