WordPress makes ranking in search engines a lot easier; Every time you update a page WordPress tells Google that a change has been made and they need to come back to index the changes. With a traditional website Google only knows a change has been made when they do a periodical check of your website.
Wordpress also makes it very easy to make a change to the content of your website, if you can use Microsoft Word you can use the tools Wordpress provide. That means you don't need to pay a Website Studio every time you would like a simple adjustment to your site's content.