<P> The "Hummingbird" update was announced as part of Google's 15 - year anniversary and a Guardian technology journalist described it as "the biggest change to the inner workings of the world's most popular search engine since Google's "Caffeine" update in 2010 ." The update was progressively introduced over the month prior to the announcement and will benefit more modern forms of search, whereby users ask Google a question rather than entering keywords into the search box . </P> <P> The Google Knowledge Graph is a system that Google launched in May 2012 that understands facts about people, places and things and how these entities are all connected . Google's Knowledge Graph is used both behind - the - scenes to help Google improve its search relevancy and also to present Knowledge Graph boxes, at times, within its search results that provide direct answers . </P> <P> In May 2017, Google enabled a new "Personal" tab in Google Search, letting users search for content in their Google accounts' various services, including email messages from Gmail and photos from Google Photos . </P> <P> In June 2017, Google expanded its search results to cover available job listings . The data is aggregated from various major job boards and collected by analyzing company homepages . Initially only available in English, the feature aims to simplify finding jobs suitable for each user . </P>

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