Here's a breakdown:

* Velocity is the speed of an object in a specific direction.

* Acceleration measures how quickly that velocity changes.

This change in velocity can be:

* Increasing speed: The object is speeding up.

* Decreasing speed: The object is slowing down (also called deceleration).

* Changing direction: Even if the object's speed remains constant, changing direction means its velocity is changing.

Think of it this way:

* Speed is how fast you're going.

* Velocity is how fast you're going and in what direction.

* Acceleration is how quickly your speed or direction is changing.