Reel or reels is a term most often used by video slot and slot machine players. It refers to horizontal columns that are an integral part of slot games.
If you have played slots before, you know that every reel features one of each symbols available in the slot. Whenever you press the button or pull the lever, the reels spin before coming to a stop, at which point you can see whether you have landed a winning combination or not.
In modern slots, the most common number of reels is five. However, video slot developers continuously create new and intricate titles to make the gameplay more exciting, which results in some unique-looking slots. While vintage slots have as little as three reels, some software providers go as far as to create titles that have two playing grids.
However, regardless of the number of reels, they always serve the same purpose.