There are some new updates of Google Algorithms that I would like to summarize as following.
Also, Google start showing the site navigation, adding Site Hierarchy into search result. That you need to create a site with clear hierarchy and text links, Create a site map with links to important pages.
This is the official caption from Google Blog that will see their continuously improvement of ranking algorithms.
For the last several months, a large team of Googlers has been working on a secret project: a next-generation architecture for Google’s web search. It’s the first step in a process that will let us push the envelope on size, indexing speed, accuracy, comprehensiveness and other dimensions. The new infrastructure sits “under the hood” of Google’s search engine, which means that most users won’t notice a difference in search results. But web developers and power searchers might notice a few differences, so we’re opening up a web developer preview to collect feedback.