The document discusses several social media platforms - Facebook, Twitter, YouTube, and Yammer - and performs a SWOT (Strengths, Weaknesses, Opportunities, Threats) analysis for each one. Facebook's strengths include its large user base and social features. Twitter's strengths are its following feature and real-time news. YouTube's strengths are its ability to upload videos and its large audience. Yammer's strengths are its email features for internal company communications. All of the platforms face threats from other social media and the internet.