Wireless signals are electromagnetic waves that transmit data without the need for physical connections like wires or cables. These signals are used in various technologies, including Wi-Fi, Bluetooth, and cellular networks, allowing devices to communicate over short or long distances. The transmission of wireless signals occurs through antennas, which send and receive the waves. The strength and quality of these signals can be affected by obstacles like walls or interference from other electronic devices. Wireless signals enable convenient connectivity for smartphones, laptops, and other gadgets, making communication and data sharing easier.