Do you have a mobile or responsive site?
If not, on April 21 you may find it harder to rank in Google’s mobile search results. Google announced algorithm updates that will have a “significant impact” on mobile search results worldwide for mobile searchers. The update improves rankings for sites that provide a mobile-friendly experience to searchers on mobile devices, and, by association, demotes sites that do not. The reason both webmasters and Google like responsive design is because it is the simplest and least risky method.