The document provides tips and tricks, or "hacks", for using various social media platforms effectively for link building and marketing purposes. It recommends strategies like building credibility on Wikipedia before promoting your own content, befriending influential users on sites like Digg and YouTube, using descriptive tags and titles to optimize content across multiple platforms, and engaging with blogs and communities to develop relationships. The overall goal is to leverage social media networks to pass link juice and visibility to your own website and online profiles.