many, including and not limited to:
- Energy meter. (see Daily energy monitoring)
- knowing if devices are being used (washer dishwasher, see https://philhawthorne.com/making-dumb-dishwashers-and-washing-machines-smart-alerts-when-the-dishes-and-clothes-are-cleaned/).
- Integrates with SmartIR for the same purpose (AC). (see SmartIR - Control your Climate, TV and Fan devices via IR/RF controllers)
- Most important, Having a better understanding of energy consumption -> optimize -> minimize ecological impact