Let's begin with a simple web page that is not mobile optimized. To be clear, we aren't saying it can't be used on a mobile device. Not at all. But it may not be usable on a mobile device. It may be hard to read (text too small). It may be too wide. It may use forms that don't work well on a touch screen. We don't know what kinds of problems will have at all until we start testing. (And we've all done testing of our websites on mobile devices to see how well they work, right?)
