nstant messenger applications remain the most commonly used social media in Mexico, in part due to the easy portability of the software, according to Andy Atkins-Krüger's recent WebCertain Search and Social Report 2010. Twitter and Facebook are gaining in popularity, however, with about 50 percent of online users are now active on Facebook as well. Internet access is limited to just over 25 percent of the Mexican population, so the potential for growth in this largely untapped market makes it a popular target for newer social media sites.