Today has been good for social networks, with both LinkedIn and Facebook hitting key milestones.
LinkedIn says that it has now reached 200 million members, with two more joining every second. The professionally oriented network says it's added more than 13 million members since November. It reached 100 million March 2011.
Deep Nishar, LinkedIn's senior vice president of product and user experience, reflected on this milestone in a blog post. He also posted an infographic, which you can see below.
Meanwhile, Facebook shares hit $30 today. Up over 3% today, this is the first time that the company has been trading at $30 since it's post-IPO collapse. In August it was trading at just $18, less than half of what the social network—which has one billion active users—debuted on the market at.
Facebook's recent push for mobile has been met with largely positive reception, while the site has also become more effective with advertising. Business Insider dives into why analysts have become bullish on Facebook here.