Many exercises employ the use of external resistance. These could be in the form of dumbbells, barbells, kettlebells, pulleys, or resistance bands. The easiest way to overload is to increase resistance
The second way to progressively overload is to increase the number of repetitions you do per exercise. Keep it small, at most 1-2 reps
In this situation, you use the same weight and the same rep scheme. You are increasing the volume by dividing the workload into more equal bouts.
This will improve muscular efficiency, as your muscles have to overcome fatigue before starting the next set.