Google Rolls Out Mobile First Indexing
Google announced on the 26th of March 2018 that they will use the mobile version of the page first for indexing and ranking. This means that if you are hiding important page assets and content on the mobile version of your website then your site might suffer a demotion in rankings and traffic. If you would like to learn more about mobile first indexing then take a look at the Google Webmasters post entitled Rolling out mobile-first indexing. You might also find the following video interesting where John Mueller discusses issues to do with the early roll-out of Mobile First Indexing.