Benefits of Responsive Design

The website would scale its size automatically based on the size of the mobile, tablet and desktop.
Mobile usages is growing every year very rapidly.

Higher ranking in mobile searches if you have a responsive website.
It makes it easier for the customer to see your content on mobile phones and tablets.

Faster and smoother user experience.
Safety against duplicate content penalties.

No re-direction is needed for users to get to the device-optimized view, which reduces loading time.