While online casinos nowadays will allow you to play a variety of casino games, from craps to poker, there is one game that stands out as the best. Slots  – an evolution of your typical “fruit machine”, online slot machines are by far the most popular game at the casino. All of the most popular online gambling sites offer hundreds and sometimes even thousands of these games. They’re simple, often have great graphics and most importantly offer you the chance at massive jackpots!