The way people interact on the web has completely changed in the last few years with the boom of mobile devices and tablets. The user’s experience is by far the most important aspect to consider when designing websites. If the page elements do not respond quickly to keyboard and mouse input behaving unexpectedly, you will lose the user and their interest. Providing a great experience on mobile devices is critical for a successful website. Responsive Design is generally the most cost effective way to provide it catering to the mobile and desktop experiences with a single site.
The ultimate goal is to feel comfortable when interacting with the site regardless of what device a visitor is using to access your site. Responsive design provides you’re user with a complete seamless experience that is adaptive to any screen size keeping a wide variety of users on your site.