Among various methods of gambling, online casino gambling has become a trend lately. These online casinos are known by several names such as Internet casino, virtual casino etc. The concept of online casino is the same as that of land based casinos. The main advantage of online casino gambling over traditional land based gambling is that it can be done at any hour from any corner of the world. Online casinos give enormous opportunities to gamers to play and earn huge amount of profits. Most of the casinos offer high payback percentages and that is the most lucrative aspect of online casinos.There are a couple of casinos that make tall promises in terms of unbelievably high payback percentages in regard to slot machine games like poker. There are also a few casinos that use a well programmed random number generator. In such casinos, table games usually have a preset house edge. The payout percentage is fixed and is decided according to rules of the game.Online casinos can be broadly classified into three categories namely web based online casino, live based casino and lastly download based online casino. Web based casinos allow gamers to play their favourite games without even downloading the specialised software. Games are played either through HTML interface or browser plugins such as Macromedia Shockwave and Macromedia Flash. Download-based online casinos, on the other hand, have a mandatory requirement to download the software. In fact, you cannot start playing unless and until you download this software. Live casinos provide live gaming environment to its players that makes the game more enjoyable.Gamers playing at online casinos usually never leave the casino without earning profits. Reward can be in cash or kind. Every time, it is not necessary that you will get handsome cash. Sometimes, you don’t get cash at all but you get an opportunity to win exciting jackpots and several kinds of bonuses. There are bonuses on new sign-ups. Most of the online casinos require you to pay a certain amount before allowing you to try your luck in online casino gambling.There are some online gambling casinos that provide its gamers with cash back bonus in which you get back a specific portion of the total amount you lost in the game. Online gaming offers an average gamer numerous opportunities to multiply his/her income by several times. There are lots of lucrative casino bonuses that include instant cash bonus, sign up bonus, no deposit casino bonus and many more. The best part about online casino gambling is that without investing even a single penny, you can become rich overnight. There are many casinos that allow you to play for free. In fact, for opening account, the casino gives free bonus; that is more than what one could hope for. Monthly bonuses have also become a part of strategy of most of the online casinos to entice visitors. But that is an added advantage. So, who wouldn’t mind receiving a certain amount of money every month?What most of the gamblers do is they don’t make any investment to play games at online casino. They simply use the bonus amount to gamble and win further prizes. So many gamblers have become millionaires within a short span of time. All this has been possible through online gambling at casino. To conclude, online casino gambling is believed to be one of the quickest and most lucrative means of earning money.