WordPress began as a blogging platform and quickly expanded into a content management system that powers 22% of the entire internet.
In fact, according to Matt Mullenweg in his State of The Word 2013 address, 69% of those whom use WordPress use is only as a content management system for their website, not as a blog.
The primary content region on a WordPress site is referred to as the content area. It can contain all different types of content, from text and images, to video and audio. The content area is where the primary web page content or blog post content that you write is added and formatted.
NOTE: Even though content can also be put in a sidebar or in a footer, content in those areas are put into widgets, so they have different names such as, sidebar widget area, footer Widget area, Home page widget area, after-post widget area, etc.