Velocity of an object at a specific instant of time is called an instantaneous velocity.
Instantaneous velocity provides speed and direction of an object at a specific instant of time.
It is a vector quantity.
In the curve between the position-time graph, it represents the tangent line on the curve.
Its SI unit is meter per second (m/s).
For an object moving with the constant velocity, its average velocity is equal to its instantaneous velocity.