The bench press is a compound exercise that strengthens the chest, shoulders, and triceps. It builds upper body strength, enhances muscle mass, and improves pressing power. It's the generic chest press a drafted program references by default — "chest press" on a plan means this movement, done with whatever pressing tool fits your equipment and shoulders that day.
What changes the exercise is the angle and the tool. Tilt the bench up for the incline bench press to bias the upper chest, or down for the decline bench press to hit the lower chest; narrow your grip with the close-grip bench press to load the triceps. The incline dumbbell press lets each arm move freely, and the machine chest press locks your path so beginners — or anyone pressing without a spotter — can push the chest safely.
For whom: everyone from lifters building base pressing strength to advanced trainees chasing chest size and power. If a plan just says "chest press," treat it as a free choice — pick the variant that matches your equipment and how your shoulders feel, and the rest of the program still works.