The majority of social media sites are seeing far more traffic and time spent coming from mobile devices than from desktops.
Dr. Pamela Rutledge‘s insight:
You’ve probably noticed, but mobile devices have smaller screens than desktops and laptops (at least currently). This means that producers have to consider a host of design issues. “Mobile friendly” isn’t enough. Content has to be created to be brain-friendly to ensure usability and engagement. Usability and engagement are not the same thing.
See on econsultancy.com
Media Psychology Blog 