Today most of the population uses social networks such as "Facebook" and "Twitter" to interact with each other through these social networks. Businesses are growing in today's world and they use these social networks to advertise them because they know most of the people today use them,so its a good way for them to advertise and get more customers.Companies today pay people to work for them by using "Facebook" or "Twitter to advertise them so when you like something for any business your making somebody money.