RFID tags are small electronic devices that use radio waves to transmit information. They consist of a microchip and an antenna, allowing them to communicate with a reader. RFID tags can be passive, active, or semi-passive, depending on their power source. They are commonly used for tracking items, managing inventory, and enhancing security. These tags can store various types of data, such as product details or identification numbers. When an RFID reader sends a signal, the tag responds by sending back the stored information. This technology is widely used in industries like retail, logistics, and healthcare for efficient data management.