google: app interstitials will cause issues with mobile-first indexing

Google's John Mueller has stated that app interstitials will be problematic when it comes to mobile-first indexing..   For example, then that's what Google will index in search results..   Clearly that's issue as it's the homepage that should be indexed..   Users want to land on web page when they're on desktop where app interstitial would be irrelevant..   Most importantly, from SEO perspective, if Google recognizes app as the homepage then it could impact how it's ranked in search results..   Mueller points to Google Webmaster Central blog article that contains examples of acceptable alternatives to app interstitials..   Specifically, ion for acceptable alternative..   For example, the app install banners provided by Safari and Chrome are examples of banners that use reasonable amount of screen space...   In order to not cause problems with mobile-first indexing, interstitials should be created in way that search engines can still see the normal content on the web page..   The interstitial should also not cause the page to change URLs when user, or search crawler, lands on it..   Read more