Did you try it? If you don't have a mobile device, you can try something else. Go to the upper right corner of your browser window and click on the boxes, which should make your browser window smaller and place it in the middle of your monitor screen. Now, drag the sides of the browser window in to make it narrower. How does it look? This website should be adjusting its width and proportions, based on the size of your browser window.
A website that is built this way is called a responsive website. Responsive design is the new requirement for modern websites, allowing them to work well and look good on everything from desktops to tablets to laptops to smartphones. Why build a new website without incorporating responsive design from the start? Why upgrade your website without using the opportunity to make it responsive? That's right; there's no reason to skip responsive capabilities.
Vizlogix builds its websites to be responsive by default by employing the Twitter Bootstrap framework, developed by Twitter and used by more and more sites all over the world. Why not yours?