Google expands mobile-first indexing after 1.5 years of testing
Mobile-first means that the mobile version will be considered the primary version when it comes to how rankings are determined. Sites with only desktop content will continue to be represented in the Google index, although, mobile-friendly content does get better ranking for searches that originate from mobile devices. If you don’t have a mobile version of your site and your desktop version is not mobile-friendly, your content can still be indexed; however, you may not rank as well in comparison to mobile-friendly websites. This is expected to affect incoming traffic for many smaller sites that don’t have mobile versions, as Google doesn’t have separate indices for serving search results. Mobile rankings are determined by mobile usability and the mobile version of the site is what you’re going to see on the index. If you’re worried that your site may take a hit, be sure to make your website’s content mobile-friendly. Make sure your mobile version has all the high-quality, valuable content that exists on your desktop site. This could include text, videos and images. Make sure the formats used on the mobile version are crawlable and indexable (including alt-attributes for images).