Recent years have brought about new devices that have now become common. Smartphones and tablets have produced a very mobile user and with that a need to ensure your designs are ‘responsive’ to the device display. Hence, the responsive design. In the early days of the web, designs were targeted to be displayed on computer monitors that were standard sizes and resolutions. As websites grew in numbers and displays began to get larger, viewing habits also changed.
Viewers that resized their browsers and often found the website layout shifting and distorting the design. To avoid this you would then need to design a separate website for each display and resolution. This would be quite difficult. So in a sense, the responsive approach was to solve this problem of differing viewings that altered the design layouts without creating a different website for any dimension.
So where does that lead you? If you have a website, you need to ask the question “does it work on all devices?” If it doesn’t, it might be time to update it. If you do not have a website, be sure that whatever you are about to developed is also going to be responsive.