<p>Three-in-ten adult social media users have set up at least one of their accounts to automatically "tag" their posts with their current location.</p><p>Three-in-ten adult social media users have at least one of their accounts currently set up to automatically "tag" their posts with their current location, up from 14% two years ago who had ever done this, according to a May Pew Research Center survey.</p><p>Such "location-tagging" was more common among younger social media users, the survey found. About a third of users aged 18-49 said they'd set up their social-media accounts to location-tag their posts, compared with 26% of 50-to-64-year-olds and just 18% of users aged 65 or older.</p><p>While location-tagging has grown more popular over the past two years, another location-based practice "checking in" via a geosocial service such as Foursquare seems to have become less so. The May survey found that 12% of adult smartphone owners (equivalent to 7% of all adults) had used a check-in service , down from 18% (10% of all adults) in February 2012.</p><p><a href="http://www.pewresearch.org/fact-tank/2013/10/08/where-in-the-world-are-you-facebook-or-foursquare-may-know/">Keep reading...</a></p>