My camera is locked to the ball, how to stop the camera from shaking all over

The node at the bottom connected to normalize and make vector and branch.
what is that node? (Between 1 & 0)
I’m really sorry I’m just new to Blueprints.
i want to understand this, so is it the spring arm that is making it swing all over and move all the time?
So essentially locking the arm and allowing the vertex’s to activate upon movement ?
or is it the physics of the ball that make it move and the spring arm is a product of the movement?
Sorry for all the questions , If I owe you a tutor fee let me know , haha , but really I appreciate the knowledge.