The document discusses the evolving use of social media in public relations and marketing. It notes the decline in network news viewers and rise of platforms like Facebook and Twitter. The author explores how the Monterey Bay Aquarium is actively engaging communities on multiple social media platforms like Facebook, YouTube, and Twitter to extend visitor experiences, drive visitation, and help fulfill its mission. Examples of tools and campaigns used on each platform are provided. Resources for tracking influence and learning about social media best practices are also referenced.