It’s also possible that you run a business that has all of these different audience segments as customers, but that you need to market to them in different ways. Someone dropping several grand a week on marketing won’t need an “affordable” agency like a small business would and a small business may only feel intimidated if you talk about that kind of ad spend.
With few exceptions, such as American Idol, the Super Bowl and the Olympics, it is not common for a substantial audience to watch a program at once. Still, networks do target particular demographics. Lifetime targets women and MTV targets youth. Sports channels, for example, STAR Sports, ESPN, STAR Cricket, and Fox Sports, target the niche market of sports enthusiasts.