WordPress is the open-source content management system that powers a significant share of all websites. It comes in two versions: WordPress.org, the self-hosted software you install on your own hosting, and WordPress.com, a hosted service with its own plans.
Self-hosted WordPress offers full control, extensibility through thousands of plugins and themes, and low long-term costs, at the price of responsibility for updates, security and maintenance. It is the natural choice for small businesses that want to own their site and grow it freely.