The web is more than just building a website these days. You can find a lot of brick ‘n mortar companies that will offer you a website for peanuts but that will be just a website.
Over the last few years, web applications have become much more complex and increasingly popular. They are created with the main goal of user-centered experience.
The aesthetics and the functionality of your webpage might meet and even exceed your biggest expectations, but are you truly pleased about its content? Is it truly informative, useful, well-organized and updated regularly?