This document provides an overview of key concepts in smart grid technology including: - Advanced Metering Infrastructure (AMI) which connects smart meters, utilities, and consumers for two-way data exchange. - Home Area Networks (HAN) which connect devices in homes like appliances and displays to the smart metering system. - Neighborhood Area Networks (NAN) and Sensor and Actuator Networks (SANET) which connect devices at the community level for monitoring and control. - Challenges to AMI include high costs, integration challenges across utility systems, and need for standardization.