WordPress is now the world’s most popular CMS, powering 22% of the web. I’ve been using WordPress for the past 8 years for almost all of my sites.  Even Forbes backend is WordPress.
In an interesting post, Jonathan Allen from LT analyzed the popularity of different SEO plugins for WordPress in a study of over 48 million sites using the SEO service Lipperhey. He found that, of the sites whose CMS they were able to identify, WordPress powers 68% of them!
Though it’s tempting to think of plugins as bolt on features, they actually solve fundamental challenges of building a solid a website; things like creating a sitemap, mass editing, and keeping content compatible with any theme changes you may make. If you’re looking to optimize your page, there are a host of different SEO plugins that offer a lot of flexibility and really do make WordPress a viable option as your CMS.
However, designing an easy-to-use site that presents many different content types can be more of a challenge. Many people find that WordPress’s default features can’t sufficiently organize the content they host, making their site less intuitive in comparison to their competitors.
But developers don’t have to settle for the default web experience. With some coding skill, creating your own custom post types and taxonomies is a relatively simple way of making your site feel more organized and professional. After going over a few basics, you’ll see how customized features and plugins can make the most common CMS into a truly unique experience.
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Default Post Types
There are five default types of posts that WordPress offers: posts, pages, attachments, revision, and nav_menu_item. But for our purposes, all we really need to know for now is the difference between posts and pages.
Article source: http://www.forbes.com/sites/johnrampton/2014/12/17/3-tips-for-using-wordpress-as-a-cms/