Gary Illyes from Google just announced onstage at PubCon, a webmaster conference, that Google plans on rolling more sites into the mobile-first index over the next several weeks.
Marie Haynes, who is in the audience, posted on Twitter:
Jesse McDonald, also in the audience, posted on Twitter as well:
The mobile-first index is Google’s attempt at looking at the web and indexing and ranking the web from a mobile-first perspective. This means that if you have a mobile-friendly version of your website, instead of indexing the desktop version, Google will first index that website’s mobile version.
We have a large FAQ for everything we know about the Google mobile-first index — so be sure to catch up there, because it should be expanding in the not-so-distant future.