Slot machines have their roots in three-reel mechanical games, but the large majority of slots in modern brick-and-mortar casinos are played on video screens. Online, of course, all games are on video.

Like slots with mechanical reels, video slots and online slots are easy to play. You just slide your money into the bill validator, choose how many paylines to play and how many coins to wager per line, and hit the button to spin the video reels.

Nothing is ever quite that simple, and there are six important things to know before you play video or online slots:

  • As on modern games with mechanical reels, results are determined by a random number generator.
  • What you see on video screens is a user-friendly representation of the game being played on the RNG.
  • The house gets an edge because it pays winners at less than true odds.

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