Mobile version of websites will increasingly be indexed instead of desktop versions.
Google is rolling out mobile-first indexing more broadly for its search index. This means that Google will crawl a site’s mobile website content for indexing rather than the desktop version.
The move will apply to sites that use a responsive web design or are dynamically served. Sites that don’t have a mobile-friendly version will continue to have their desktop sites indexed.
Mobile-first indexing does not affect search rankings (assuming you’re serving the same content). It only impacts which content is indexed. However, mobile-friendly sites get an edge in rankings when people search on mobile devices.