Google announced back in August 2016 that it will begin to devalue web pages in mobile search with intrusive interstitials as of January 10, 2017. Going forward, Google recommends using interstitials on mobile pages that only take up a “reasonable” amount of screen space.
“To improve the mobile search experience, after January 10, 2017, pages where content is not easily accessible to a user on the transition from the mobile search results may not rank as highly.”
Takeaway: Content on the pages you have indexed in mobile search must be readily available when a user clicks through to the page from Google.  Limens terms:  Keep It Simple Want to learn more> Avoid Googles Mobile Penalty