Web design is not just about visual aesthetic–usability is also important. You want your site to look slick, beautiful, and easy to navigate. First impressions are everything, so you need to influence visitors from the front page.
Having a website is very important to any company that wants to reach a wide market, but it also requires continuous improvement in order to stay relevant. Your current site may look terrible on a mobile device and you may want to offer your users responsive experience.
Having an up-to-date and functional website is important for good branding. Perhaps it might be time for you to consider having a full redesign of your site?