Looking back at the history of search, we can see a very clear evolutionary path where online marketing solutions are concerned. As Rand Fishkin points out in this video, SEO strategies have evolved from focusing purely on a link graph, to a point where search and social media come together to make the social graph just as important. Interestingly, so far it seems that Google is actively encouraging this idea, with projects such as Wikisearch, Real-time Twitter, and more recently Google Buzz all contributing to the rise of the social graph.

Take a look at this video from Whiteboard Fridays, explaining both the evolution and the future of search, and see how your online marketing solutions should also evolve to concentrate on a combination of link and social graphs.