Facebook added $15.3 billion in value to the European economy in the past year, COO Sheryl Sandberg said at the Digital Life Design conference in Munich Tuesday.

Sandberg, in her closing keynote on how social media is reshaping opportunities for economic growth, added that the social network added 230,000 jobs in Europe in 2011.

Sandberg cited the findings from a joint study between Facebook and Deloitte, being released today, and also announced that the company is launching a new “Ad Boost” program to help small businesses in Europe. Facebook will give €100 in credits to 50,000 businesses for marketing on the site. The social network will work with local partners to dole out the credits to small businesses.