On-line brochure /Static sites
Most probably, the most popular type of web sites that companies invest in. The objective is to make your company and product/service information available on-line, and promote yourself. It would normally be quite a small website with the basic pages being: homepage, what we do or services page and a contact page. These are the cheapest type of website as the content is static (text and a few pictures).
Dynamic website
These websites take longer to build than static sites and cost more as they contain more interactive or dynamic content.
E-commerce sites
The objective of these websites are to sell your products online and reach out to audiences far and wide. One of the best examples of an e-commerce website is amazon.