1) The document discusses the evolution of Facebook marketing over time from early features like groups and pages to current focuses on audience interaction, organic and paid reach, and mobile marketing. 2) As Facebook has grown, marketers must optimize for audience interaction and user-generated content, employ paid reach strategically, and embrace mobile opportunities. 3) Looking ahead, the document predicts Facebook will continue investing in mobile and local features while graph search and "parent-child" targeting create new marketing possibilities, though marketers must also address fragmentation and potential peaks in Facebook usage.