Here's a breakdown:
* Friction: A force that opposes motion between two surfaces in contact.
* Static Friction: The specific type of friction that acts on objects at rest and prevents them from starting to move. It's a "holding" force.
* Kinetic Friction: The type of friction that acts on objects that are already moving.
Think of static friction as the force that keeps a book on a table from sliding off, even if you give it a little push. It's the "sticking" force that needs to be overcome before motion can begin.