Social Media 5 tools for identifying online influencers These (mostly) free Web-based mechanisms enable brand managers to find people with a particular type of expertise in specific parts of the world. By Adam VincenziniNov. 20, 2013 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.