Well, if you have information that constantly changes and need updating, than you need a dynamic website.

A dynamic website is a little more complex than an HTML website.

A dynamic will have a database running on the background and all your information will be stored in this database.

Why do you need a database? well you need a database so that every time you will create a new page with text and images, the website will store all the information in the database and this will give you the flexibility of creating lots of new pages/categories without the help of your web designer.

So the design and setup of a dynamic website is more expensive, but if you have this information changing all the time a dynamic is much cheaper to manage than an HTML website.