Online casinos allow players to gamble over the Internet and in the comfort of what ever place they may be in rather than traveling to wherever their favorite establishments are located. They may be better known as Internet casinos or virtual casinos due to this.

Just like their tangible "brick and mortar" counterparts, online casinos have ratings in the type of payback percentages and odds. A lot of them even publish payout percentages on their own sites, vaunting higher payback and higher frequency than their competitors.

Payback percentage is defined as "is the overall percentage that a machine will return to the player within the long run." This parameter may be programmed into what ever game the virtual casino might be running and is set based on the owner's specifications.

As a result of its very nature of being virtual and intangible, online gambling agent casinos have trust issues with prospective and even regular clients.