NEW YORK (CBSNewYork) – Millions of Americans are already on LinkedIn, the job hunting social network.

Many though are confused about what to do on the site.

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That’s why CNET’s Sree Sreenivasan stopped by CBS 2 to give us his tips on how to get the most out of the site.

Sreenivasan explained that LinkedIn, a social network for professionals, recently crossed 150 million users. Sreenivasan explains that a common mistake is to think of it as simply a job hunting site, and suggested thinking of it as a career management tool.

Some things Sree says you ought to know.

* LinkedIn has 150 million users, but only 4 percent global penetration among professionals, so there’s a lot of growth ahead for it.

* It’s not just a job hunting tool, it’s a career-management tool. It’s a great way to find a job, but more importantly, it can help you during your entire career.

* When your company starts having layoffs, it’s too late to figure it out.

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* Use it when you don’t need it, so it’s there when you need it. Like your real-life network, you need to nurture and grow your LinkedIn network when you are not emergency mode.

* Make sure you have a recent, recognizable profile photo.

* LinkedIn is de-emphasizing recommendations, which means they are still important, but you can get to 100 percent “completeness” much more easily.

* Add your skills – there’s a new section where you can list specific skills that apply in your profession: “budget management” or “video shooting and editing” or whatever applies to you.

See Sree’s constantly updated Social Media Guide by clicking here.

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Sree Sreenivasan is CBS2’s technology expert, appearing every Wednesday morning at 6:50 am to discuss ways to save you time, money and aggravation. He is also a social media blogger for CNET News. He is a professor and Dean of Student Affairs at Columbia University’s Graduate School of Journalism. You can find him on Twitter and Facebook  and on his personal site. E-mail your questions with “CBS New York” as the subject line.