The basic recipe here is that slot machines have a number of symbols on each reel. These are randomly shuffled around so that when the reels stop spinning, the screen shows a mix of symbols. If the final symbols match and are aligned on active paylines, starting from left to right, you receive a payout.
By utilizing RNGs, reputable virtual casinos guarantee that every spin, shuffle, or dice roll is independent of previous results, thereby replicating the odds of real-life casino games. Players can rest assured they have a fair chance of winning, just as they would when playing in a brick-and-mortar casino.