RFID (Radio Frequency Identification) is a technology that uses radio waves to automatically identify objects. It consists of RFID tags attached to objects, RFID readers to interrogate tags, and an application system. There are three main types of tags: active tags with batteries, semi-passive tags with batteries to power the chip, and passive tags that derive power from reader signals. Common applications of RFID include supply chain management, asset tracking, electronic toll collection, access control, and contactless payment cards. An online survey found that respondents saw benefits of RFID like improved efficiency and reduced costs in various industries. However, RFID also faces challenges like relatively high tag costs and potential signal interference from some materials.