More Navigation Options in Google’s UI
Google made changes in their UI by adding more indexes and entities to make work of the users easy.
“New dynamically generated navigation links have been added above the search results to suggest additional information that is relevant to a user’s query. For example, a search for “python” will now generate links to Google Blog Search(TM), Google Book Search(TM), Google Groups(TM), and Google Code(TM), to let the user know, there is additional information on his or her query in each of those areas. As a result, users can find a wider array of information on their topic, including data types they might not have initially considered.”
More options in navigation tab include other Google services like books, Documents, groups etc. All in all, query results will be more comprehensive with more options for you to pick most apt one.
