A flexible grid based layout means that the layout of the web page should be defined in a relative value. This flexible grid allows the website to respond to different device widths. If you set a web page to be 90% width of the screen size then every device that views that web page would have a good reading experience.
WordPress blog release 3.3 is announced. Experienced users will appreciate the new drag-and-drop uploader, hover menus for the navigation, the new toolbar, improved co-editing support, and the new Tumblr importer. We’ve also been thinking a ton about what the WordPress experience is like for people completely new to the software. Release notes here
Responsive Web Design is a phrase keyed by Ethan Marcotte in the book of the same title. Responsive Web Design is a technique used to address a specific problem; designing a website that displays well across different devices.
People don’t just view websites on a desktop PC anymore, the explosion of smartphones and mobile devices like the iPhone, iPad and Android based phones have meant a significant shift in how people engage with the web.