Analytics firm comScore released new data today showing that U.S. mobile social media audiences increased 37%, and more than half of social mobile audiences read a post from an organization, brand or event on their mobile device.

While the mobile browser accounted for more visits, research shows that the social networking app audience has grown five times faster in the past year. While the mobile browsing social networking audience has grown 24% to 42.3 million users, the mobile social networking app audience shot up 126% to 42.3 million users in the past year.

Mobile Social Networks' Audiences: Facebook, Twitter and LinkedIn Come Out on Top

The Facebook mobile audience is fast approaching 60 million users. Facebook, Twitter and LinkedIn grew their mobile audiences by at least 50 percent in the past year. Facebook's numbers have risen 50% from the previous year to 57 million mobile users. Twitter's audience jumped 75% to 13.4 million users, and LinkedIn's mobile audience grew 69% to 5.5 million users.

What Does This Mean For Brands on Social Networks?

With the proliferation of daily deal sites, location-based social networks and sites like Groupon Now, which offer location-based deals-on-demand, it's increasingly important for brands to engage with their customers on social media. According to the comScore report, in August 2011 a total of 80.3% read posts from people they know personally, while 69.5% posted status updates from their mobile devices.

People are increasingly checking social networks more from their mobile devices. More than half (52.9%) read posts from organizations/brands/events. One of three mobile social networkers snagged a coupon/offer/deal, and twenty-seven percent clicked on an ad while visiting a social networking site.