Answer: their ability to span a wide geographical region.
Explanation:
The ability of satellites to cover a wide geographical area is both a good thing and a bad thing. It is good because it can increase the viewership of an advert. It however can be bad because companies would be unable to customize their ads for various locations.
This means that they would be unable to charge different prices as people in different regions would be able to see prices offered to other regions as well. It also means that the values expressed in the ads in one country could be shown in another country where it might be considered offensive.
