Google is sending out notifications for mobile-first indexing issues detected on your site. And in that notification it says “Google expects to apply mobile-first indexing to all websites in the next six to twelve months.” Yes, probably by the end of this year, all indexing will be done using mobile-first indexing at Google. Thins means site owners have less than a year to make sure their site is ready for mobile-first indexing. No more focus on desktop – mobile is key!