Online casinos can be divided into two groups based on their interface: web-based and download-only casinos. Some casinos offer both interfaces.

Some casinos offer 'Live gaming', either exclusively, or as part of a wider online casino offering. In live online casinos, popular casino games such as roulette and blackjack are dealt by real dealers in casino studios, in an attempt to convey more of the atmosphere of a physical casino. Player actions (including chat) such as 'hit' in the game of blackjack may be transmitted to the dealer; in some online casinos more than one player may 'sit' at a particular 'seat' on the table, and in this case there is no interactivity between player and dealer.

The question of which player requested the extra card that the dealer dealt and which chose to 'stand' will be handled by the software. It is usual for players to be able to observe a video feed of the action, and equally common for players to opt to turn it off, if they lack the bandwidth - as the cards are read by OCR and other technology, the video feed is only ever a visual cue.

Many online casinos offer sign-up bonuses to new players making their first deposit, and often on subsequent play as well. These bonuses are a form of marketing that may incur a cost (potentially justifiable in order to attract a new player who may return and deposit many more times), since the casino is essentially giving away money, in return for a commitment from the player to wager a certain minimum amount, usually a multiple of the deposit and/or bonus credited to the player's account.

 Since all casino games have a house edge, the wagering requirements ensure that the player cannot simply walk away with the casino's money, and indeed if the wagering requirements are sufficiently high, he may in fact have a negative expectation, exactly as if he had deposited without any bonus.

Casinos may choose to restrict certain games from fulfilling the wagering requirements, either to restrict players from playing low-edge games, or to restrict 'risk-free' play (betting for instance both red and black on roulette, thereby completing the wagering requirement with a guaranteed profit, after the bonus is taken into account.

Web-based online casinos are websites where users may play casino games without downloading software to the local computer. Slots Oasis Review  Football Betting guide