IoT OTA update plays a critical role in optimizing smart energy systems by enabling remote updates for key applications like smart energy management systems, EV charging hubs, smart grid management systems, and smart meters. These updates allow for continuous improvements without requiring physical interventions, ensuring systems stay up-to-date with the latest features and security patches. Smart energy management systems can be fine-tuned to better balance energy consumption across grids, while EV charging hubs can be upgraded for improved charging speeds and efficiency.