Good news for B2B social marketers – LinkedIn's membership is on the rise. The company announced this week that it hit the 100 million professional mark.

The company says it is averaging nearly 1 million new members per week. The growing audience offers a wider engagement pool for B2B marketers looking to connect with potential business partners on the site. In fact, LinkedIn explains that many of its members have successfully used the site for “sourcing new deals.”

The company highlights user Barabara Lemaire, “who found key benefactors for her nonprofit organization on LinkedIn, helping homeless women and children rebuild their lives.”

So how can marketers harness the potential of this growing platform? One way may be to share branded content that will help get their businesses discovered on the site.

As Brafton reported, the professional social site recently launched a news page – LinkedIn Today. The feature demonstrates the power of news in driving business decisions, and it could also serve as a channel for content marketers to get noticed in the social arena.