Flexible Websites for a Mobile World
In this new age of internet accessibility from desktop to tablet to phone there is a wide variety of ways to view content online. It should be considered if you are offering the best usability to your visitors.
A responsive website uses the same code build, but transforms the content to be more comfortably fit in smaller screens as the size decreases. This becomes useful for the now popular tablet and phone interface sizes.
Having a responsive site allows for easier vertical scrolling, larger text, and no need for zooming.
This is beneficial over having a separate mobile site in the sense that it uses the same links and pages, which keeps search engine optimization in check.