https://seodigitalgroup.com/what-is-mobile-first-indexing/

Recently, Google made an adjustment to how they are indexing websites within their search engine. It's in fact a rather large switch that anybody with a site must know about. They're calling it Mobile-first Indexing, and it could considerably influence whether or not you should make some adjustments to your website to help with Google search engine results. Up until now, Google collected data from sites based on the desktop version of that website. Nonetheless, for lots of websites, the information on the desktop version of that website as well as the info on the mobile version of the website were very different. Now, as opposed to getting the info from the desktop version, Google is switching over to the mobile version.