First is related to expansion of a list of useful related searches and the second is the addition of longer search result descriptions - both of which help guide users more effectively to the information they need.
Google is deploying a new technology
that can better understand associations and concepts related to searches, and one of its first applications offers users more useful related searches (the terms found at the bottom, and sometimes at the top, of the search results page).
For example, if you search for [principles of physics], Google's algorithms understand that "angular momentum," "special relativity," "big bang" and "quantum mechanic" are related terms that could help you find what you need.
With this Google can target more queries, more languages, and make their suggestions more relevant to what users actually need to know.
They are also offering refinements for longer queries.
The new related searches will feature starting today in 37 languages all around the world.
The second change is when users do a search on Google, each result starts with a dark blue title and is followed by a few lines of text ("snippet"), which gives you an idea of what each page is about. To give more context, the snippet shows how the words of the query appear on the page by highlighting them in bold.
When a long query with more than three words is entered, Google will increase the number of lines in the snippet to provide more information and show more of the words typed in the context of the page.
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