More and more people are going online from their homes, their workplace and now even their mobile phones. The internet is THE place to go when looking for products and services.
A weak web site for your business may turn potential customers away. Having no website at all leaves you with much less exposure to your potential customers and markets, so it is vital that your website works for you.
People judge your business based on their experience they have on your website. If the website looks amateur, or the information they want is to hard to find, they assume your business is less than professional and will move on to another.