Question

Why do you think LinkedIn has become so popular?

Answer 1

Probably because it allows professionals to display their skills, areas of strength, what they do, etc. Facebook and Twitter are more informal, at least in my opinion.

Answer 2

LinkedIn is for businesses and people high up in the business industry to get their names out there and to connect with people who could potentially help them or share ideas, even get together and join together as a group. It's like the facebook for all kinds of businesses.