Believe it or not, there is still confusion around the upcoming mobile-friendly algorithm that Google is pushing live on April 21st.
The algorithm will only impact searches done on smartphones - only. This does not impact desktop searches and it does not impact tablet searches.
(1) Google's official Twitter channel posted this on Twitter:
@Jumzle The upcoming mobile-friendly change is for mobile users, not tablet users.— Google Webmasters (@googlewmc) April 1, 2015
(2) Do a search on smartphone vs tablet, do you see the "mobile-friendly" label? Nope.
Again, this algorithm only impacts searches done on smartphones, which can be a significant percentage of your referrals.