WordPress is a free, open source content management solution (CMS). It’s extendable though community-contributed plugins. It’s has a super-easy-to-use administration and a Word document-like WYSIWYG editor that can make anyone a webmaster. That all adds up to why WordPress is the most popular CMS in the world.
Our “base model” CMS includes a self-hosted install of the WordPress package (see hosting requirements here). That package includes things like: 5 pre-built user roles, a basic slider for your home page, search-engine friendly URLs, and (of course) all the goodness packed into the WordPress core, such as: Commenting System, User Management, Word-like WYSIWYG Page Editor, Drag & Drop Media Uploader, Theme Administration, and much more, possible through Plugins.
WordPress is the most common content management solution we recommend to clients as it’s open source, community contributed and (by far) the easiest to learn and use.
There are two others in the ‘big three’ CMS providers out there. Here’s a little flow chart if you’re interested in reviewing them.