How come do you think people use social networking services?
 

One interviewer ask this Question. But I do not know the answer to that question.
Please Share Your Ideas.

for this check on which sites they are present like on facebook search with company name and similar for others

see there are many visitors through it. you have all type of visitors as only by social networking you get it.

I think, Traffic is the main motive behind this.
thanks

I came across this because of my friends only and there are so many sites available which displays many advertisement of these social sites.