Mobile devices require software development teams to focus on only the most important data and actions in an application. There simply isn’t room in a 320 by 480 pixel screen for extraneous, unnecessary elements. You have to prioritize. So when a team designs mobile first, the end result is an experience focused on the key tasks users want to accomplish without the extraneous detours and general interface debris that litter today’s desktop-accessed Web sites. That’s good user experience and good for business.