Wordpress is a best example of CMS. It helps you to easily maintain you content from the codes of the site.  This makes easy way for the person to manage a website. Wordpress is simple and easy to use; following points make is easy and popular:

SEO-Friendly: wordpress based websites are search engine friendly it easily attracts search engines to crawl the site web pages.

Lots of plugins: There are lots of plugins available for wordpress web development, which gives advance functionality to your website. You can download it at free of cost. This is very helpful for small-sized business.

Thousands of themes: if you thinking that CMS is open source and someone may still your themes then no need to worry. Wordpress has huge collection of themes, free and premium which gives your site uniqueness.

Web based interface: wordpress interface works as WYSIWYG. These give you functionality for easy uploading, edit and remove content, multimedia.