The Complete Guide to Slot Machines: Techniques, Advice, and Insights Slot machines have long been a mainstay of both land-based & virtual casinos, enthralling playeryono slots 93s with their lively sounds, flashing lights, & the alluring prospect of large payouts. To maximize their chances of winning and enjoy their gaming experience, players must have a basic understanding of how these machines work. In essence, slot machines are random number generators (RNGs), which decide how each spin will turn out.