Responsive Web Design
"Responsive" Web Design renders optimized versions of your website for different size devices via the miracle standard of HTML5 -- the "way forward" for web-based browsers as agreed upon by Apple, Google, and Microsoft.
Having an HTML5-valid, responsive web site means you can drive content to everybody, whether on mobile phone, tablet, laptop, or desktop computer. This "universal web" approach means that you don't have to indulge in the expensive process of app building for iOS, Android, Windows, Blackberry, and whatever else.
Learn more about Responsive Web Design
Article by Superclean: Core Benefits of Responsive Web Design