With a large number of visitors increasingly accessing websites from mobile devices and tablets, it is imperative that your website, business, and consumer web applications render well across all these form factors besides the desktop.
BUILDING SMARTPHONE-OPTIMIZED WEBSITES
People expect to browse the web on their phones just as easily as they browse the web on a desktop computer. Initially, the solution to this problem was to design one website for a desktop browser and another version of the same website for a mobile browser. But this approach has become untenable, because of the large number of mobile devices with different screen sizes and different resolutions. It is no more practical to design specific websites to render well on different screen sizes and resolutions.