Shareaholic also found that Facebook mobile drove 8.25 percent of visits to its network of sites in January, while Facebook overall was responsible for 16.21 percent, meaning that mobile accounted for more than one-half of referrals from the social network.
The content discovery and sharing company offered more details in a post on its blog:
Indeed, Facebook is very much the “mobile company” everyone suggests it is.
This is demonstrated not only by the fact that mobile made up 53 percent of its advertising revenue in the fourth quarter, but by its commitment to providing a better mobile browsing experience with the introduction of its Paper application.
Effectively, if your business or blog isn’t very usable on a mobile phone, you’ll want to invest more resources into building a mobile experience your visitors can’t get enough of — or at least one they won’t hate."