Mobile searches are just as important as the desktop search. If you are selling a service or marketing a client who sells locally, your mobile search is even more important. People will often search on their phone to find something nearby, why not make sure you’re taking advantage of it?
You can read more about Google’s mobile-first indexing via the link below, or you can check your site for mobile-friendliness now via this link.
Official news on crawling and indexing sites for the Google index
Source: Official Google Webmaster Central Blog: Getting your site ready for mobile-first indexing