"Previously web designers and developers would create a separate, watered-down mobile version of a site specifically for smart phone users. However, with the constantly changing screen sizes of mobile devices, we are now moving away from the m-dot sites of yesterday and moving ahead with a one-site approach.
The one-site approach is exactly what it sounds like: one website that works on ALL mobile devices. Not only will your website work on the cell phones available right now, but it will also work on devices that aren’t even available yet. The one site approach is also recommended because it will help improve search engine rankings.
The one-site approach comes in two different flavors, responsive and adaptive. These approaches are different; yet yield nearly the same results. Whichever you choose, responsive or adaptive design, in the end your website will look and function great on nearly any device for years to come!
What is the difference between responsive and adaptive design? ..."