There are many static websites on the Internet, you may not be able to tell immediately if it is a static or dynamic website, but the chances are, if the site looks basic and is for a smaller company, and simply delivers information without any bells and whistles, it could be a static website. Static websites can only really be updated by someone with a knowledge of website development. Static websites are the cheapest to develop and host, and many smaller companies still use these to get a web presence.
At a basic level, a dynamic website can give the website owner the ability to simply update and add new content to the site. For example, news and events could be posted to the site through a simple browser interface. Dynamic features of a site are only limited by imagination. Some examples of dynamic website features could be: content management system, e-commerce system, bulletin / discussion boards, intranet or extranet facilities, ability for clients or users to upload documents, ability for administrators or users to create content or add information to a site (dynamic publishing).
Many sites from the last decade are static, but more and more people are realising the advantages of having a dynamic website. Dynamic websites can make the most of your site and either use it as a tool or create a professional, interesting experience for your visitors.