After rolling out the mobile-first index for a few sites, Google has now posted more advice regarding the mobile-first index feature.
Confirming the update, Google said “This process has already started for a handful of sites and is closely being monitored by the search team.”
Previously, the snippets in the results, as well as the content on the Google cache pages were displayed in the desktop version, which frequently caused issues for the mobile searchers. However, now they will be from the mobile version of the pages, and Webmasters will see significantly increased crawling by Smartphone Googlebot.