Define Responsive Web Design and it's advantages?

I think it is various device friendly website design. and It gives easy navigation.

A Responsive website is a website using HMTL code or CSS to shrink or resize the website to make it look better on different device.
The best part of R-site is their well looking. No matter you use iPad or iPhone, Samsung smartphone or HP laptop, R-site still has it's best appearance.

Responsive design is an approach to website design that makes use of flexible layouts, flexible images and cascading style sheet media queries. To create a responsive website, you need appropriate tools, such as MotoCMS (http://www.templatemonster.com/moto-cms-3-templates.php) and other similar tools.

Responsive design is a web design technique that creates a website that reacts to the size of a user's screen. Responsive design will optimize a user's browsing involvement by creating a flexible and responsive web page, optimized for the all devices that are accessing it.

Responsive web design refers to the design that helps websites to adapt themselves in various portable devices like mobiles and tablets to access them. This helps to generate more traffic from various devices and build your search engine popularity.

Responsive design is a web design and development technique that creates a site or system that reacts to the size of a user's screen. Responsive design will optimize a user's browsing experience by creating a flexible and responsive web page, optimized for the device that is accessing it.

Responsive design is best for seo point of view ,

A website should be responsive that automatically fits as per the screen size of different smart devices used by customers.Otherwise, the website shall loose traffic from smart gadgets.