Smartphones and tablets combined now account for 6o percent of all online traffic up from 50 percent a year ago. And 51 percent of that traffic is driven by mobile appsComscore
There are many tools out there to analyze, correct and implement mobile friendly strategies, be sure to pay attention to all the signals and information that is given. There are many companies I see and speak to on a daily basis that have no idea there is that much traffic on mobile devices. Listen to your webmaster, you may need to completely redesign your site to be sure you are not missing out on all that traffic.
Just how important is social networking to mobile? Consider the following stats:
Total mobile engagement on social has grown 55% in the past year
Social networking on mobile has accounted for 31% of all growth in total internet engagement in the past year
Social is the home of the #1 mobile property, Facebook, which accounts for 24% of all mobile time spent. The primary Facebook app accounts for 18% on its own.
More details from Comscore regarding mobile milestones and the progression as of mid year 2014.