
I think most of people are going to use Linked In for some specific use for the profession point of view such as improving sales with other partners or also get a business or jobs. Now a day Linked In is largest social networking website for this its have more use in the fields of search engine optimization and social media optimization such as:
Some most important benefit of Linked In people use it
* Increase your visibility in Internet marketing fields
* Improved your network and connectivity
* Improve you ranking and PR value
* Boost your search engine ranking
* Increase your relevancy in your business and jobs search
* Asked for advice and improved yourself with help of feedback