First of all, the most common slot machine is single reel slots, a machine with three symbols on one reel and players’ aim is to line up that three symbols to win. This kind of machine is a classics slot machine. The number of symbols per reel will directly influence players’ odds and payout.
Video slot machine involves electronic spinning reels displayed on a screen. It has a variety of lines, graphics and betting choices. This type of machine enables to introduce bonus games and free rounds which is linked to the progressive jackpot. It is also a precursor to online slot games. Most online casino has animated a theme of video slots game.
Multi-line slot machines have more reels and more lines. The principle of the single reel is totally same as players have to line up those symbols. In multi-line game, players can bet on one line or more than that. More line enable players to earn winnings by using two or more symbols from several lines.