A responsive website is a web design technique that allows a website to reconfigure itself to fit different monitor, screen sizes, resolutions and platforms. A computer with a flat high-definition screen will display the site in its highest resolution design. And when the site is viewed on a tablet or a smartphone it automatically breaks apart and reconfigures itself to fit properly into those screens and platforms.
This can be demonstrated on this site by simply resizing this browser window. If you drag one of the corners around and resize the browser, this website will automatically respond and resize to fit. This simulates how the website would react if viewed from a smaller device.
This design technique allows for a single design instead of utilizing multiple themes. As you can see from this demo, we are proficient at this programming technique and would be happy to add this functionality to your website design.