In 2012, Penguin and Panda changed the relationship between SEO and search rankings. The impact felt by those algorithm updates, however, could be dwarfed by Google's current quest to judge websites by their factual accuracy and truthfulness, as opposed to ranking pages based on links. f Google researchers have their way, we may soon look back and laugh at the time when search engines ranked web pages based on link-driven popularity instead of factual content. According to New Scientist , a team of Google researchers is currently working toward a future where search engines judge websites not on the number of other sites that trust them enough to link to them, but by the accuracy of their content. Exogenous vs. Endogenous Credibility Google researchers are brilliant, so they use words like "exogenous" to describe signals that come from outside a web page, such as hyperlink structure. They use words like "endogenous" to describe signa