Typical static webs sites have one html file per web page. These web pages do not change but are shown as they were create and need to be manually updated to refresh the content.
Dynamic Web sites operate much differently. There is not a one to one relationship between the web page displayed and the the html on the server. One dynamic page can be displayed many different ways depending on who is viewing the page and on their access level. Security and access permissions is a bonus of dynamic web sites.
Web content can be easily modified on your site through easy to understand interfaces and screens.
You don't need us to make changes or need html experience to make these changes. All updates are immediately seen by your website visitors.