21. Amit Singhal, senior vice president of search,
told reporters on 26 September 2013 that the company launched its
latest "Hummingbird" algorithm about a month ago and that it currently
affects 90 percent of worldwide searches via Google.
22. Hummingbird
will more greatly consider question words like
how, why, where and when
in search phrases, in addition to content keywords
Hence Hummingbird moves the emphasis of search
from results to answers