Google has fully rolled out the second version of the mobile-friendly update today. Google Webmaster Trends Analyst John Mueller announced it this morning on Twitter, saying, “The mobile changes mentioned here are now fully rolled out.”
Google gave us a heads-up in March that they are preparing to boost the mobile-friendly algorithm in May, and clearly, that has finished rolling out today.
This technically is supposed to “increase the effect of the [mobile-friendly] ranking signal.” As we reported in March, Google said if you are already mobile-friendly, you do not have to worry, because “you will not be impacted by this update.”
As a reminder, the Google mobile-friendly algorithm is a page-by-page signal, so it can take time for Google to assess each page, and that is why it took some time to roll out fully. So depending on how fast Google crawls and indexes all of the pages on your site, the impact can be slow to show up.