There are two main types of RFID tags: passive and active. Passive RFID tags do not have a power source and rely on the energy from an RFID reader to transmit data. Active RFID tags, on the other hand, have a built-in power source and can transmit data over longer distances than passive tags.

RFID technology is widely used in various industries, including retail, healthcare, transportation, and logistics, to improve efficiency, accuracy, and security in data collection and management.