As smartphone and tablet adoption rapidly increases, so does the importance of mobile-friendly websites.
Mobile sales have already overtaken desktop sales, and mobile Internet usage is predicted to overtake desktop internet usage by 2014. It is only logical that mobile search will overtake desktop search at some point in the near future as well.
One Website, Many Devices
One of the most appealing aspects of responsive web design is that a responsive website can provide a great user-experience across many devices and screen sizes. This is an important characteristic, since it is impossible to anticipate all the devices and screen sizes searchers will use to access your site. A site that works well regardless of these variables will provide a better and more consistent user-experience than a separate mobile site that is designed for a specific device and screen size.
Let’s take the following example. Someone searches for a product on their smartphone during a lunch break at work. They find a site that has the product they’re looking for, and decide to continue researching this product on the same site when they get home. Except, when they get home, they will use their desktop instead of their smartphone.
If the site in this example is responsive, this person will have a positive user-experience when transitioning from mobile to desktop because they will view the same site on their desktop as they did on their smartphone. On the other hand, if the site is a dedicated mobile site, this person will become frustrated with the fact that they have to locate the desktop version of the site, and find the product all over again.

