Google is changing its search algorithm Tuesday to favor sites that look good on smartphones in a move that some are calling "mobilegeddon."
Google changes its algorithm frequently, but in this case it took the unprecedented step of warning sites in February that it was coming, and giving them tips on how to prepare.
BLOGS.WSJ.COM|由 ROLFE WINKLER 上傳
Google knows a lot about you. Now you can see just how much.
Google now lets users view the search data it has on them.
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