An indoor antenna is a device used to receive television signals from broadcast towers. It is typically placed inside a home and can pick up over-the-air channels without the need for a cable subscription. Indoor antennas come in various shapes and sizes, and their effectiveness can depend on factors like location and nearby obstructions. These antennas work by capturing radio waves transmitted by local TV stations. Many people use indoor antennas to access free channels, especially in areas where cable service is limited or expensive. Proper placement and orientation can significantly improve signal quality and reception.