Unlike other marketing media such as newspapers, radio, tv etc., a web site allows potential customers to browse at their leisure. You can incorporate far greater amounts of information, which is important to a client, in a web site. They can learn about your company, it's products and services, it's philosophy and the people who make it successful.
This all culminates in creating a sense of comfort and a feeling of knowing the company. And all this before anybody at your business has even spoken to the potential client.
Back to benefits of a web site