Google has announced that mobile-friendliness will be a ranking factor for all mobile searches starting April 21. Pages that are mobile-friendly according to Google's usability tests will receive a boost in results for searches performed on a mobile device.
According to Google Webmaster Trends Analyst Gary Illyes, the update will run page-by-page. There is no site-wide penalty. If your site were to have 20 mobile-friendly pages and 10 pages Google does not deem to be mobile-friendly, the 20...
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