Social media increasingly influences not only how the public perceives a broker's firm, but also how investors find and evaluate financial advisors. With that in mind, advisors have every right to expect their firms to make the most of this marketing tool. WealthManagement.com graded the top national and regional brokerages in terms of their social media footprint on Twitter, Facebook and LinkedIn. With numbers adjusted for the size of the firm, here, in ascending order, are the top 10 most influential brokerages on social media.