Wireless communications refer to the transfer of information between devices without the use of physical connections, such as wires or cables. This technology utilizes radio waves, infrared signals, or satellite transmissions to send and receive data. Common examples include Wi-Fi, Bluetooth, and cellular networks, which enable mobile phones and other devices to connect to the internet and communicate with each other. The main advantage of wireless communications is mobility, allowing users to connect and communicate from virtually anywhere. This technology has transformed how people interact, access information, and conduct business, making it an essential part of modern life and contributing to the growth of the Internet of Things (IoT).