The main concept behind the creation of these social networking sites is to increase the interactivity among the people an make them even more socializable. Internet and computers have brought even the persons on two extreme ends of the earth together and closer . Social networking sites have become more and more popular now and these social networking sites have given a new dimension to the way how we communicate with each other .Even though these social networking sites may differ in their look and feel their basic idea is to connect you with your friends and family . They still spread to a next level in connecting with the people who has the same interest as of them such as a relationship with group of people who has common financial relationship , knowledge and likes .Effects of Social Networking sites:According to the people who keenly watch the growth in the social networking , the usefulness of the websites grow with the number of registers who use these websites . A social networking site that does not let open its gates for everyone has very little possibilities. If the network is open to all then it will offer lot of opportunity to outside members to meet new people share new ideas and cultures .This also helps the organisations and business people to publicize their products to the whole world .They have created a virtual place for the families and friends who are far away to meet up and share their experiences with each other They have helped us to find our lost friends and relatives . These social networking sites have penetrated deep into the lifestyle of the people that even many politicians depend on these social networking sites to steer their campaign to a successful path .The organisations that use these social networking sites will realize the edge over their other competitors who doesn’t use these social networking sites effectively . As already millions of users are using these social networking sites it is very easy to funnel the required audience towards a business profile.Tips to attract and retain usersMany users who visit a site for the first time they don’t visit for the next time manly because they might find the same concept some where else or nothing new . There for attracting and retaining these costumers are very crucial for any business promotion through the social media .The business owners when they choose a particular social media for promotion they should be very careful in choosing an appropriate social media for their promotion . Choosing a wrong social media will not only reap any benefits but also waste the precious time . But when used wisely these social medias can be a definite edge over others.