Why should I install an antenna?
The antenna allows high definition local channels to be received. Currently not all local channels are available over satellite or cable and with an antenna you are able to access the local channels for free. Many customers install an antenna to receive the local channels and then add a device like Roku, Apple TV or Tivo for streaming shows on Netflix, Amazon Prime, HBO, On Demand and many others for a more selective and personalized TV watching experience.
Does this mean I need a big ugly antenna on my roof?
No, antennas can be hidden in your attic out of view.