What is the meaning of this notification from Google Adsense?
I have been receiving the following notification repeatedly from Google Adsense in my AdSense Dashboard:" Your site's mobile-friendliness is now considered as a Google Search Ranking Signal"
I am earning Adsense from IndiaStudyChannel, WebQuestionAnswers, HubPages and many blogger blogs with customised top level dot com domains or blogspot subdomains.
The said notification is perturbing me and I am in a fix what to do. Can I afford to ignore the notifications. What is the meaning of this notification from Google Adsense?