Responsive web design is becoming more important as the amount of mobile traffic now accounts for more than half of total internet traffic. This trend is so prevalent that Google has begun to boost the ratings of sites that are mobile friendly if the search was made from a mobile device. This has the net effect of penalizing sites that are not mobile friendly.
Responsive web design (RWD) is an approach to web design aimed at crafting sites to provide an optimal viewing and interaction experience—easy reading and navigation with a minimum of resizing, panning, and scrolling—across a wide range of devices (from desktop computer monitors to mobile phones).
Take a look at this post on your mobile and your desktop at the same time, note they are different. The layout alters to suit the device. All our Media Design Art sites are fully responsive.
Beginning April 21 (2015) , Google will use mobile-friendliness as a ranking signal in search results, rewarding websites that are fully optimized for mobile platforms.
Most modifications to the all-important Google Search Algorithm have only a low-weight impact on search results, however Google says the effect of this change will be profound. It is very important for any business owner with a website to respond accordingly.