Widgets have been around since 2005 and became popular in 2007. They provide a way to distribute web content and services to users where they are, like on blogs and social media. There are four pillars of a distributed strategy: widgets, toolbars/extensions, Facebook apps, and APIs. Widgets can be monetized through various models like affiliate marketing or ads on the host site. Resources for learning more about widgets include blogs, service providers, and conferences.