There are plenty of sites better qualified at answering that question such as and Wikipedia but here’s our version:

Creator: Matt Mullenweg

Percentage of Web powered by WordPress: 27%

Hosted WP:

CreedWordPress Foundation

WordPress is a Content Management System or CMS. It was originally created as a blogging platform but has evolved into the most popular web site platform for amateurs and advanced users alike. WordPress is open source which means the entire platform, files and programming is available to WordPress theme builders, plugin authors and web developers. This results in a plethora of available add-ons and tools for almost any need which is why, as of 2016, WordPress is estimated to be used on over 27% of all websites today.

Because of its popularity, flexibility and supporters, it has become a first choice for many who have decided to have an online presence. Unfortunately, with popularity comes some maintenance issues and security risks. Not all web developers are equally talented so, although there are numerous helpful WordPress themes and plugins, some are not built to the same standards and can cause problems with other add-ons. Also, hackers typically look for the most popular platforms since there are more opportunities to find vulnerabilities due to poor construction, maintenance or security.