Let's say you're out on the way to a restaurant for dinner and you get an email notification from work. You open the notification on your phone, click the link, but you find sometimes you can't read it because the text is too small and the site User Experience (UX) is designed for a desktop. Or worse, it is a mobile specific site but missing a great deal of information that you would see on the regular desktop site.
Your sales and field service teams are mobile, so they need a mobile expense reporting solution. Meeting with prospects and taking care of your valued customers is important work and your team may incur travel and project related expenses. Instead of waiting to receive expense reports when they get back to the office, why not let them submit expenses from the field?