How is Pressure Created? What even is Pressure?

-Pressure only Happens in a Gas State, for 1 Simple Reason - Particles and Move. -The Particles move Anywhere, and can Bang into Each other and whatever is in their Way, like Walls -So when they Hit Something, they give a Force Against it. On its own its very Small, but there are Millions of Particles, that all Hit and Collide, creating a Net Force. -More Particles in that Given Volume = More Often Collisions with the Walls = Pressure is Higher. -Pressure, simply enough, is a FORCE