A responsive web site detects the type of device viewing your web site (computer, tablet or smartphone) and re-arranges the layout design and page content to display optimally on that specific devices browser.
Mobile consumers are growing at a rate so rapid they are predicted to surpass desktop computer usage for web browsing within two years. A website which is not optimized for mobile use will leave an enormous opportunity for new business out of the equation.
Going mobile-responsive can drastically reduce development costs & time. Instead of wasting resources building separate websites for mobile, tablet, and desktop PC users, you can build a responsive web site just once that works on all devices.
Search engines prefer responsive web design over separate websites for each type of device. By providing a single, device-scalable version to all of your visitors, you make it easier for search engines to index your pages and content.