You paid a lot of money for a website a few years ago. If you now look at your webpage on the computer, it may still look good, but needs to be updated because most people today visiting websites from tablets and/or smartphones. Try filling out your forms or reading without wild zooming in and out or scrolling.
Google started favoring sites with responsive web design a few years ago, which were specially developed for mobile devices. Don't miss the connection here.
The development in web design from the past few years has led to the fact that today websites can be developed much more customer-friendly, faster and cheaper.