Fitness - Tricep dips

The video tutorial provides a step-by-step guide on performing a dipping exercise using a bench. It begins with setting up the correct position, followed by instructions on maintaining body alignment while dipping. The tutorial emphasizes the importance of keeping the body straight and strong, and suggests completing a total of 12 repetitions without touching the ground.

What is the overall goal of the exercise described?

What is the main action performed with the arms during the exercise?