This may go down in history as the week the mobile web became the web. On Monday, Google began indexing and ranking pages on its search engine based on the mobile versions of websites rather than the desktop ones, the company announced. The change may seem minor, but it underscores how Google views and presents the web to the world—as mobile first.
Google has a single index that serves search results on mobile and desktop, the company said, so desktop search results will be fed by the mobile-first index, too. Webpages that only have desktop versions will continue to be included in the Google’s index based on their desktop sites. It added that content gathered through mobile-first indexing will have no ranking advantage over desktop or mobile content that’s not gathered in this way yet.