Why need is responsive design?

Hi
why need is responsive website designing. Can you brief more about the terminology "responsive" used in designing and development aspects of a website

Web Responsive Design is very important for web development as it directly impact the website.
Essentially, responsive design is a way to put together a website so that it automatically scales its content and elements to match the screen size on which it is viewed. It keeps images from being larger than the screen width, and prevents visitors on mobile devices from needing to do extra work to read your content.

Currently, there are many devices that people use, including for accessing the Internet. All these devices differ in screen size, resolution, and, accordingly, how the site can be displayed on them. Therefore, it is very important that your site looks good and displays correctly for any of the users, regardless of what device they use

Responsive Web design is an approach whereby a designer creates a Web page that “responds to” or resizes itself depending on the type of device it is being seen through.  That could be an oversized desktop computer monitor, a laptop, a 10-inch tablet, a 7-inch tablet, or a 4-inch smartphone screen.

In 2013 Responsive Web Design (RWD) is a very important aspect when  you are considering designing or developing a a website – this is due hugely to the growth of smartphones and other mobile devices around the world in last few years. More and more people are using smaller-screen devices (than traditional desktop computers) to access web pages all the time at office or on the go and as a business owner you cannot afford to ignore this trend. The number of people using mobile devices to do all kinds of works on internet will continue to keep growing without exception. That is where the Responsive Web Design (RWD) comes in. If your website does not implement Responsive Web Design technique then you are potentially losing a lot of businesses as chances are that your website looks awful in mobile devices with smaller screen resolutions

Responsive design is a way to put together a website so that it automatically scales its content and elements to match the screen size on which it is viewed. It keeps images from being larger than the screen width and prevents visitors on mobile devices from needing to do extra work to read your content.
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Custom Software

A website is a platform consist of information about the relevant business. Navigation on the website is important to users as well crawlers to crawl the site. The responsive is completely affect on users viewpoint.