Target market : Demographics defined by but not limited too ( age, race, religion, region, occupation, health, lifestyle ) to your idea or product. What demographics will benefit the most? What demographics are more likely to purchases, download, call to action etc.?
Using psycho and demo you can Target to exactly "who" you are marketing to. With this effective concept you can reach more of the marketed audience.
Still dont get it? you should try taking paid surveys . these will show you exactly what you should be looking for in a marketing stratagy. Also you can make a few bucks for beer.