This document discusses legal concerns regarding social media use and advertising. It summarizes FTC guidelines on endorsements and testimonials which were updated in 2009 due to the rise of social media. The guidelines aim to protect consumers by requiring disclosure of any material connection between an endorser and advertiser that could affect the endorsement's credibility. Both advertisers and endorsers can be liable for misleading claims or failing to disclose relationships. The document provides examples and best practices for complying with these FTC guidelines when using social media for advertising purposes.