A responsive website means that one website is created to perform on all devices without having to make a separate website for each one.
Have you ever gone to a website and had to use your fingers to zoom in on the text in order to read it? Ever attempted to fill out a form on your cell phone and end up frustrated? That’s because the website is not responsive and using old technology.
If your website is not responsive you are going to loose more traffic as our lives become more mobile.