This is a test of commonsense. Complete the next sentence:

How to market your social networking site and earn money from it
Choose a specific category or market.
Decide which niche you can cater to. It can be focused on particular group or category like college students of a community, single parents, baby boomers, and the like.
You can save money by focusing on a single niche instead of wanting to get everyone to join. Potential subscribers will always have the inclination to join in networks of people with like interests and background.