A slot is a narrow opening. It is used in a variety of contexts, from a keyway in a piece of machinery to a slit for a coin in a vending machine.
The slot receiver position is a common place in the NFL today and was an important part of the game for several decades. Players like Wayne Chrebet, Wes Welker, Charlie Joiner, and Julian Edelman have all paved the way for this particular type of receiver and have helped make it a popular position.
Unlike outside wide receivers, a Slot receiver lines up in the slot area of the field before the snap and is positioned pre-snap between the tight end and the outside receiver. This allows him to take advantage of different passing routes, especially if the quarterback is trying to get him behind the line of scrimmage.
Since they line up a few steps off the line of scrimmage, slot receivers also need to have good blocking skills. They will need to block a variety of defensive positions, including nickelbacks, outside linebackers, and safeties.
They will need to be fast and agile enough to blow past defenders. They are also often tasked with carrying the ball from time to time, especially on pitch plays, reverses, and end-arounds.
The best slots to play are those that have a high return-to-player percentage (RTP). This is measured by how much the player wins over the course of a set amount of play. This is a good indicator of how well the slot will pay out and whether it is worth your time to try it out.