Your website will be visible to all your potential and current clients. You will no longer be tied to the limited geographic exposure of the golden pages or the phone book. Your customers all over the world, won’t need to visit your office or retail outlet to see example of what you offer nor will they need a brochure or other marketing materials posted to them.
A web site allows you to track the number of visits and where they came from, e.g. an online advert or search engine. It can record the number of enquiries or online sales in the case of an ecommerce site, thus producing a ratio of enquiries to visitors which gives the conversion rate. With this information you can take steps to improve this ratio and increase sales.