There are two basic markets you can sell to: consumer and business. These divisions are fairly obvious. For example, if you're selling women’s clothing from a retail store, your target market is consumers; if you're selling office supplies, your target market is businesses (this is referred to as “B2B” sales). In some cases—for example, if you run a printing business—you may be marketing to both businesses and individuals.
No business—particularly a small one—can be all things to all people. The more narrowly you can define your target market, the better. This process is known as creating a niche and is key to success for even the biggest companies. Walmart and Tiffany are both retailers, but they have very different niches: Walmart caters to bargain-minded shoppers, while Tiffany appeals
