Stopped is the past tense of stop, which means to not move anymore.
Stopping can be a good thing, like when you stop to rest, or a bad thing, like when you stop because you can't go on.
Examples:
The car stopt at the red light.
She stopt running because she was tired.
I stopt the music because it was too loud.
The cat stopt chasing the mouse when it saw the dog.
The river stopt flowing when the dam was built.
The teacher stopt talking when the bell rang.