What's the Difference Between A Normal Website and Mobile Website?
Traditional websites generally have a set width. When a mobile phone comes to one of these sites, it has to shrink the page down
to make everything visible. This works fine until you actually try to read
or click on something. Users generally have to zoom way in and then scroll
around to read content or click a on button.
Mobile Websites relieve this problem by simplifying layouts and using flexible widths. They also avoid using columns, flash animation, and large file sizes that aren't conducive to mobile devices.
Here's The Breakdown