Pages and Posts: what’s the difference?
Posts are the bread and butter of the WordPress theme. You can have as many of them as you want, and they’re usually listed in newset-first order on blog list pages. Generally, posts are published periodically and used for any kind of timely content such as news items, blog entries, episodes of a podcast, stories, and so on.
WordPress pages are different from posts, in that they are static and not date-sensitive. Authors usually use pages for content like About information or Contact Us. A theme can have as many pages as the author wishes, and publishers can even use subpages to establish page hierarchy; however, the majority of sites use only a handful of top-level pages at most. The exception is a business site that uses WordPress as a CMS (content management system) rather than a blogging engine.