The search engine has been developing the new indexing for a year a half after they announced in 2016 its plan to change the way its search index operates, TechCrunch reported.
Google detailed how its algorithms would eventually be shifted to use the mobile version of a website's content to index its pages.
It also hopes its new development will help to understand its structured data and to show snippets from the site in the Google search results.
Last December, the tech giant said it begun to transition a small handful of sites to mobile-first indexing.
In a blog post Google said the new update will allow them to use the mobile version of a webpage "for indexing and ranking, to better help out - primarily mobile - users find what they're looking for".
Since 2015, the majority of people who use Google have been using the site from mobile devices.
The search engine already have begun to prioritise mobile sites in several ways including boosting the rank of mobile friendly webpages on mobile search results back in 2015.
Although claiming that the mobile-friendly indexing won't directly impact how the content is ranked, they do say that it will help the website to perform better in mobile search results.
This is just the first wave of updates that Google is undertaking to improve users experience on the search site.
Recently Google Chrome recently they are set to update their browsing experience and in a recent post on the tech giant's Chromium Blog, the search site has announced its next upgrade to Chrome will mean adverts that play automatically with sound will be blocked.
The update read: "As announced earlier, autoplay is now allowed only when either the media won't play sound, after the user clicks or taps on the site, or (on desktop) if the user has previously shown an interest in media on the site.
"This will reduce unexpected video playbacks with sound when first opening a web page."