Interesting. Just to tack on to this, here's the link and the first paragraph to an article:

http://searchenginewatch.com/sew/how...-stay-friendly

On February 26, 2015 Google gave marketers incredible insight into changes they have planned for their search algorithms and the exact day they will go into effect. Specifically, they announced that on April 21, 2015 mobile search engine results pages (SERPs) will be impacted by the mobile-friendliness of a website.