Facebook accounted for 85% of mobile sharing activity among US internet users in Q4 2014, according to ShareThis, up 51% year over year. The social site was slightly less popular for desktop, with just under three-quarters of the total.
A large chunk of that mobile traffic is likely coming via smartphones. According to a November 2014 study by Frank N. Magid Associates, smartphones accounted for about 44% of US Facebook users’ weekly time with the social network. Tablets grabbed 25% of time spent with Facebook each week, and desktops 32%. Read the rest at eMarketer.