Online casinos saves travelling period of players because a player wish to go land based casino club means it require long travelling. Using online slot game software is completely eliminate travelling simply travelling is out of action. Stunning features are regularly updated in slot machines, most casino clubs trump card is slot. All over the world we cannot find single club without facility of slots. Centre of attraction is slots not only attractive quality also. Casino clubs are use a standard algorithm called random number generation in slots. Special thing is slot machines algorithm is optimal results. Algorithm only generate optimal results, there is no fixed results are generated through random number generation. In the past casino slot games are used manual result generation mechanism. This method is heavily scrutiny by people and they thoroughly oppose manual result generation mechanism. Because the mechanism is won’t produce winners in regular intervals. The results need to be favor players in regular intervals is welcoming but winner is selected in long intervals is not a reliable one. The world of gambling is expand its limitations in certain extend, almost every country build casino clubs in their country. Casino clubs will automatically raise the level of revenue.