Gone are the days when websites were different and preferable than blogs. The technical gap between these two platforms is becoming narrower day by day. Wordpress is closing this gap very fast and now a days blogs are more preferable than websites for business.
Wordpress distinct advantage over websites and other blogging platform is the plug ins. There are thousands of plug-in developed by WP fans. There is plug in for almost any thing, whether it is for designing, SEO, traffic, marketing, editing, caching, media, etc., and some has many plug ins. So, a novice who does not have any idea about website creation (forget about SEO) can create an outstanding website with the help of Wordpress. There is no need of ANY technical know-how.
The other important and critical thing is that a blog is a dynamic entity (meaning content is updated regularly) and hence will rank very high in Google search, as Google loves fresh and useful content. The importance of blogging can be gauged by the fact that every website has a blog now-a-days to incorporate fresh content regularly and so rank in the search.