WordPress comes with two standard types of content: posts and pages.
A WordPress post is best suited for chronologically ordered content, such as dated content commonly called a “blog post.”
On many WordPress sites, the front page consists of excerpts of the most recent posts (listed in reverse chronological order.) WordPress, however, can also be configured to display a static page on the front instead.
WordPress was originally designed as a blogging platform, but as content types have expanded (through the use of custom post types) it is not ONLY a blogging platform with chronologically ordered content. It can also be used as a general purposed Content Management System (aka CMS.)