This machine focuses on your pectorals (chest), deltoids (shoulders), and triceps (arms).
This is a plate loaded machine, so add appropriate weights either side. Then adjust the seat so you are comfortable with your feet firmly on the ground.
Once ready, take a seat and grasp the handles firmly. Shoulders back. Push forward in an upward motion, squeezing at the top, then returning back down nice and controlled.
This instructional video is shown by Ellie Young, a PT at the Ascendancy.