TV Signal Amplifiers; (sometimes known as “Boosters”) are used for a number of reasons; however the two main Amplifiers are:
Mast Head Amplifiers
These are used to boost the incoming signal in locations where the signal is too weak for the antenna alone to provide adequate signal levels.
These are designed to boost the signal levels where you may have a good incoming signal but may have multiple TV outlets. Most good quality TV Antennas installed in a strong signal location will service between 3-4 outlets; however the more points you have installed the less signal there is to go around. So the Distribution Amplifier will increase the amount of signal available for distribution to a larger number of outlets.