Today's the day that Google is changing its algorithm to favour mobile-friendly websites. While there is likely to be some concern amongst regulators in the EU about this move discriminating against Google's competitors (see here from the Economist), there is no doubt that it reflects the way that consumer behaviour is changing and the importance of providing an excellent mobile experience to customers. See the article below for some good data sources on mobile usage.
Mobile search is now increasingly important. ✔ 25% of overall search queries are now on mobile devices ✔ 58.7% of smartphone users and 73.9% of tablet users access search ✔ 42% of calls to businesses are driven by mobile search ✔ 80% of local searches on mobile devices turn into purchases