Responsive web design

1. design your sites with multiple screen sizes/resolutions in mind
2. work under any platform, any browser size, any orientation
3. media query: detecting the viewport size
4. flexible grid-based layout for relative sizing
5. http://mediaqueri.es
6. check responsiveness: http://ami.responsivedesign.is
7. Responsive Web Design: fluid measurements, flexible grids, varying CSS rules

Why RWD?
1. Easy to share your data with a single URL
2. Easier for search engines to index your page
3. Fewer files = less maintenance
change one != maintain all of them
4. less redirection = lower load time