Step 1: Understand the scheme's purpose.
Namo Drone Didi Yojana empowers Women Self-Help Groups (SHGs) by providing 15,000 drones for agricultural use, creating income-earning opportunities for rural women.
Step 2: Identify the training content.
The scheme provides a 15-day training program covering two key skills - drone piloting and the application of agricultural inputs such as pesticides and fertilizers via drones over farmland.
Step 3: Eliminate the other options.
Maintenance/repairs, reconnaissance, and factory-building are not the primary objectives. The scheme focuses on empowering rural women to earn income by offering drone-based crop-spraying services to farmers.
\[ \boxed{\text{Drone pilot training and application of agricultural inputs}} \]