A slot is a narrow opening, usually in the form of a groove or slit, through which something can be passed. For example, a mail slot on a door is used to receive letters and postcards. The term is also used in computer programming to refer to a specific position within a sequence or series of instructions. A slot in a computer can be used to store variables or to pass information from one program to another.

In football, a slot receiver is the second wide receiver, usually located on the inside of the field. They are usually the target of short passes and passes behind the line of scrimmage, and they often need to be precise with their route running and timing. They must also have good chemistry with the quarterback, and be able to block effectively without the benefit of a fullback or tight end.

The Slot receiver must be able to run all types of routes and have great awareness of the defense. In addition to their role as a pass catcher, they are also very important for running plays such as sweeps and slants. Because of their location on the field and their pre-snap motion, they must be able to get in front of defenders quickly and avoid getting hit. They must also be able to deal crushing blocks, and have the ability to act as a shield for ball carriers. The Slot is also a key part of many pass protection schemes.