If you sell video games, you will probably target a younger clientele than you would if you sell artificial hips, for instance. (Don't laugh too hard. I have seen TV ads for certain artificial joints. These campaigns are to build top of mind awareness so that, if and when you need one, you will be prone to ask your doctor, "What about the Owta Joint? I saw it on TV." And the hope is that the doctor will either recommend that joint or will consider using it.)
But let's not forget that building a tight demographic can lead you to have tunnel vision regarding other candidates for your products/services. I had lunch in a small town recently and was sitting near a group of about eight or ten women who were apparently part of a knitting or quilting circle. As I ate, I overheard the conversations of these ladies, average age probably about fifty, but ranging up to maybe 65 or so. At one point one of the women said she wished she knew how to find out about a certain bit of information and one of the older ladies said something like, "Why don't you just ask Google? That's what I do when I want to find out something." To look at them, you would have thought they were too "old" to be internet savvy, yet there were some in that group who were apparently quite comfortable using internet search.
A search term you may have heard is "long-tail search". This involves an approach to your keyword usage that takes into consideration keywords that are not in the most-used category in searches. In a similar way, take into consideration that there will be potential customers for your business that don't fall into the mainstream demographic breakdown you may derive from the cold, formulaic marketing technique you may use.
Remember that, even if your company caters to a younger general demographic, it is still the older generation that has the most money to spend. In many cases, the electronics and other techie gadgets the younger set owns were bought for them by their older family members. Christmas gifts, birthday gifts, graduation gifts -- cell phones, iPads, laptops, GPS units -- are many times provided by mom or dad or grandparents.
You can reverse that idea and see the potential in marketing some stereotypically "older" products/services to younger people as well. The decision to move older parents to a retirement community may be influenced by younger family members, for instance. That joint I mentioned earlier might be recommended to grandpa by a son or grandson who saw and remembered the commercial.
So, yes, by all means, do your demographic homework. But try to keep your focus broad enough that you can see the sense in hitting some potential markets that might seem to be a little outside the box. For one thing, the competition might be less for some of those customers.





