A casino online is a virtual gambling establishment where players can access a range of games, including video poker, roulette, blackjack, and live dealer table games. They also feature a variety of bonuses and promotions. In addition, online casinos offer a secure banking environment and fast withdrawals. Some even have two-factor authentication available for extra security.

Many casino online sites offer sign-up bonuses to new customers. These may take the form of free money or additional wagering credits. In either case, the terms and conditions attached to them require that the player wager a certain amount before being eligible to withdraw the bonus funds. This is a way for the online casino to weed out people who don’t have the funds to play for real.

The top casino online real money websites are licensed and regulated by state gaming boards or other government entities. They use encryption to protect your financial information and test all the games they offer for fairness. They also have dedicated customer support teams that are able to handle all types of issues.

Some of the best US online casinos also offer mobile apps for iPhone and Android devices. These apps are designed to run quickly and provide easy navigation. You can download them for free from the app store. In addition, some of these apps have unique features that set them apart from their rivals. For example, some of the best casinos for iPhone offer a streamlined depositing process and exclusive app-only promotions.