What is a target market?
A target market is the market a company wants to sell its products and services to, and it includes a targeted set of customers for whom it directs its marketing efforts. Identifying the target market is an essential step in the development of a marketing plan. A target market can be separated from the market as a whole by geography, buying power, demographics and psychographics.
Source: Target Market http://www.investopedia.com/terms/t/target-market.asp#ixzz4Yxxq4wu2