The term "speed" refers to the rate at which a thing moves.

The velocity of an object describes how fast it is travelling as well as in which direction it is moving.

The rate at which an object moves along a path is called speed

The rate and direction of an object's movement are known as velocity.

Example: A car's speed has been stated if it is said to operate at 80 km/h.

Example: The car's velocity has been stated if it is said to be approaching at 80 km/h to the north.

A scalar quantity is speed.

A vector quantity is velocity.