A well-organized "contact" page generates confidence in your customers. It's also essential to ensure the potential customers that they can always be in touch with seller and ask a bunch of different questions about products, shipping methods or ordering process.
"Contact form" application is an answer to all needs arise during composing shop's contact page. A lot of contact pages (not only at shops but also common services) were analyzed and the result of that is a very powerful module which gives you a possibility to prepare an ideal contact page.