How does market research help to define a market?

Answer:
Market research can confirm you your ideas about your target market. What is the profile of your demand? Who is going to buy/look for your product/service?
By researching existing information and carrying out some primary market research, asking your potential future clients you will know who is interested and who is not.
First answer by Marketentrepreneur. Last edit by Marketentrepreneur. Contributor trust: 2 [recommend contributor recommended]. Question popularity: 1 [recommend question].