Always keep in mind your website’s goal. That will define what type of website you need for your business.

Never forget the content of the website is the most important aspect of the site.
The question is do you need a dynamic WordPress blog site or a static HTML website?
If you have a lot of content and you want to update the site by yourself choose a blog site.
If you need only a few pages and you do not want regular updates then the website can use static HTML web pages. Pay attention this though; if you need to make any changes and updates on a page, either you will need a web designer or you can do it yourself if you know HTML language. With a Dreamweaver, CoffeeCup HTML Editor, Notepad ++, FrontPage or any other HTML website editing software can be helpful to do updates.
Further information about HTML editors WYSIWYG (What You See Is What You Get) code generators read here.

What is the difference between a blog site and a website?
A short answer: Blog websites ( written with PHP code/language ) are dynamic websites. HTML websites are static websites.

If I want to explain as simple as possible I can say this; HTML web sites are static, a designer or a person who knows HTML language can update website with a ftp program.
On the other hand a blog is done with php like WordPress, it can be updated without needing a program or designer by the site owner.

What are these terms means? HTML is the code required for a web page to show up in your web browser; PHP is the code that changes the HTML code.