Simple robots, tank drives, small conveyor belts, and learning. It's cheap ($3–$5).
You are building a high-power robot, a delivery robot, or something requiring efficiency. The L298P technology is outdated and inefficient (it wastes battery life as heat). hw 130 motor control shield for arduino datasheet
These are the screw terminals for DC motors. Stepper 1: Uses M1 and M2. Stepper 2: Uses M3 and M4. Simple robots, tank drives, small conveyor belts, and