The company launched the LinkedIn Volunteer Marketplace today to connect professionals with nonprofit organizations that are looking for volunteers. It's a separate part of LinkedIn's website where nonprofits can post new opportunities, and it also aggregates postings from websites like Catchafire, Taproot Foundation, BoardSource, and VolunteerMatch. Not only does this expand on the LinkedIn Board Connect, a feature that came out in 2012 to help nonprofit leaders find professionals to join their boards, but it's a way for LinkedIn to kill two birds with one stone: get more nonprofits and potential volunteers to use the site, and increase traffic