Mobile messaging apps have seen tremendous growth in user numbers, and WhatsApp’s broader international reach should help Facebook enter new global markets—and the social network may help the chat app expand its reach in North America. More than 200 million people worldwide now use the app regularly, according to a February 2014 blog post by GlobalWebIndex, and this figure jumped 175% last year. While Asia-Pacific had the largest audience by far (101 million), North America was where the real story was. The number of users in the region jumped 230% to 7 million in 2013—an admittedly small number, but one that shows major potential for growth. Read the rest at eMarketer.