While Twitter is a social network but wants to become your go-to messaging service, Reddit is basically the 21st century incarnation of a huge online forum - one that really seems to want to become a social network. The "front page of the internet" is adding new features left and right to help achieve that (wise?) goal. Profile pages are being revamped, for example. And now a new partnership with Foursquare has been announced. This lets users geotag their posts with a location or a venue, thus providing more (though not necessarily useful) context for everything that goes up on...
Source: http://www.gsmarena.com/reddit_adds_post_geotagging_through_foursquare-news-25322.php