As power systems have become increasingly decentralized and interconnected, utilities, industrial facilities, and critical infrastructure operators require greater visibility into energy flows and network performance. Smart electricity meters have evolved beyond traditional energy measurement to become intelligent endpoints within modern grid architecture. By combining revenue-grade metering accuracy with secure communications and remote data acquisition, smart meters deliver actionable insights that support operational optimization, demand-side management, outage detection, and distributed energy resource integration. Their ability to provide granular, near real-time data makes them a foundational element of resilient, efficient, and digitally connected Smart Grid networks.