2022 the parent company of WordPress, over 42% of the Web is powered by WordPress. When you look at only content-heavy websites, the numbers are far higher. Some of the world’s most popular websites, including that of The New York Times and The Walt Disney Company, are powered by WordPress
WordPress is the preferred Content Management System (CMS) for several reasons including the following: ease of customization, mobile readiness, powerful media management, security features, SEO capabilities, and a well-designed backend.
There is also a wonderful community of WordPress developers all over the world.

In 2020, over 455 million websites use WordPress.com. That means that the WordPress market share is 35% of all websites in the world! This is an increase of 2% compared to 2019 and a 4% rise from the previous year. Also, over 20% of all self-hosted websites are currently using WordPress.

WordPress is the most popular content management system available on the web today. The platform currently holds a 62% market share for websites that were built using a content management system. Over 400 million people visit WordPress powered websites each month.

State of the Word – WordPress Yearly Surveys
Matt Mullenweg, founder and CEO of WordPress, addresses some of these questions in his state of the word survey held each year. The numbers as well as the presentations can be found online for the years 2011, 2012, 2013, 2014, 2015, and 2016 , and 2017, and 2018, and 2019 This allows people to track the progress of WordPress as a CMS.

The 2019 presentation gives you a great overview of how people are using WordPress, as well as core WordPress development changes.