The dumbbell bench press replaces the barbell with two independent weights, forcing each arm to control its own load through the full press. It trains the same muscles as the barbell version, the pectorals, front deltoids and triceps, but adds a stabilization demand and a longer range of motion, since the dumbbells can travel below chest level. Lifters use it to fix left-right strength imbalances, to get a deeper pec stretch, or when a barbell and rack are not available.
Because stabilizing two independent weights is more fatiguing than a barbell, work in a slightly higher rep range, 6 to 10 for a strength focus or 10 to 15 for hypertrophy, with 2 to 3 minutes rest between sets. Progress in the smallest dumbbell increments your gym has, often 2 kg per hand, and expect slower jumps than the barbell bench since balance limits the load before your chest strength does. Use it as either your main press on a day without barbell access, or as a second, deeper-range press after your barbell bench to finish the chest.
Should I go heavier on dumbbells or the barbell bench? The barbell almost always allows more weight since it doesn't require stabilizing two separate loads; comparing the two directly isn't useful, track each one's own progress instead.
Why do my shoulders feel more worked than my chest? Letting the dumbbells drift too far out to the sides during the descent shifts stress onto the shoulder joint; keep the elbows around 45 degrees and press the dumbbells slightly inward at the top.
Is the deeper range of motion actually better? For most lifters yes, since it stretches the pecs further, but stop the descent at a depth your shoulders can control rather than chasing maximum range.
Log your dumbbell bench press sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.