Power Saving Mode (PSM) enables idle IoT devices to enter a low-power state, conserving a significant amount of energy during periods of inactivity when no data is being transmitted. This precise management of power consumption is crucial for reducing energy costs, easing cellular network congestion, and prolonging the operational lifespan of low-power devices. PSM is particularly well-suited to NB-IoT and LTE-M low power wide area network technologies.