An antenna amplifier boosts a radio signal considerably for devices that receive radio waves. Many devices have an RF amplifier stage in their circuitry, that amplifies the antenna signal, these include, but Cps counter are not limited to; radios, televisions, mobile phones and Wi-Fi and Bluetooth devices.
Ultimately, an amplifier isn’t going to help you receive a signal that isn’t already reaching your antenna. However, it can boost the signal to make it through a long cable run or overcome a splitter to supply more than one TV with reception