There are three OTA TV bands, each requiring a different type of antenna. There are the low band VHF (channels 2 - 6), VHF high band (channels 7 - 13) and UHF (channels 14 - 83). In addition there is an FM radio band stuck between TV channels 6 and 7, which can also have its own antenna design.
Many common antennas combine the three TV bands plus a section for the FM band into a single unit. If you live in a good reception area this is fine, but in difficult reception areas you can often get better results sticking with an antenna designed just for the stations broadcasting in your area. As an example, in my area there are no low band VHF channels, just high band VHF and UHF, so an all band combo antenna is actually not an efficient choice. A big chunk of that antenna will be doing nothing at all. In fact the low band VHF elements are the biggest part of an all band antenna so over 1/3rd of that antenna will be doing nothing but taking up space, adding weight and increasing cost.
For cases like this you can get a nice high band VHF/UHF antenna that will do a better job for less money than the all band units. You can also opt for separate antennas for each band, including the FM band.
The digital transition made things more confusing because the actual channel your local TV stations are broadcasting on may no longer match their branded channel number. For instance, in my area we had high band VHF channel 12 and UHF channel 40 prior to the transition. These two channels still use their old channel numbers in their branding and are remapped to appear on those old channels on digital TVs. However, channel "12" is actually broadcasting on channel 7 and channel "40" is now broadcasting on channel 8. This means I can get these two channels with a high band VHF antenna. If I tried to get channel "40" with a UHF antenna I would not have much luck.
So, it is important when selecting an antenna to pick one designed for the actual broadcast channels in your area, not the channels commonly referred to by the stations.
Getting that information can be difficult. I spent quite a bit of time finding the correct channels for my area when I was selecting an antenna. Here is a good source I found, showing the data for my area.
Stations for Binghamton, New York
To get your own data go here;
RabbitEars.Info
and select your market for a list of the physical channels your local stations are using.
You will find that KVIW, channel 6 (low band VHF) is actually broadcasting on channel 9 so you should use a high band VHF antenna to receive it.