One of the powerful new benefits of SharePoint 2010 is the ability to tag virtually anything. As in SharePoint 2007, editors can add authoritative tags via columns. With SharePoint 2010 , any user can add a social tag as well. Remember that effective collaboration isn't just about putting content in; it's also about getting content out. User-defined tags can help to narrow or clarify search results, so that users have a better chance at finding what they need.