Momentum equals mass times velocity, it is sometimes written as p=m*v.
A change in impulse equals a change in momentum. However, Impulse is the product of force and time, as is momentum, so they are not exactly the same thing.
Momentum is the product of the mass and the velocity of an object. It's SI unit is kgms-1.Correct, but perhaps more easily interpreted as kgm/s.
rotate a body or try to rotate.
It could be the product of (mass) times (velocity).