Below are various purposes for websites, as a website designer you should know what the purpose of each website is.
Website predominantly focused on promoting your brand.
Product or Service Information
Website geared to offer information about your company, products or services.
Website that makes revenue on advertising for other companies.
Website with the ability to process orders and receive payments.
Website that sells the product or service of another company, usually commission based.
Customer service and support
Website available for users that require product or service support.
Website the saves company money by means of online efficiencies.