This document summarizes key findings from a report about driving more calls and revenue from email. Some of the main points include: - 90% of consumers use multiple devices to complete tasks, showing the importance of omnichannel experiences including calls. - Mobile is the top source of calls, accounting for 54% in 2015, so marketers need to optimize for calls from mobile. - Mobile search drives the most calls, so marketers should test call-only campaigns on Google. - Newspapers and online review sites drive the highest quality calls among digital and offline channels.