It went nowhere. Google search engine page rank patents that Larry Page, one of the founders of Google is built around one name. They built some new perspective any time soon are not likely to be. I think Google returns more relevant than most because of it used to be. I believe that there is always work within the system being algorithmically more relevant returns exist, and there are constantly being implemented filters and / or trying to weed out spam are sophisticated.
Page segmentation is a follow visitors to your site, such as landing pages and exit pages. So that you can have a brief idea of how to improve the content and design of a flight to make it easier remove the user.