WordPress is a powerful and versatile content management system (CMS) that powers more websites on the internet than any other CMS, making it the market leader in website creation and management. Its open-source nature, combined with an extensive library of plugins and themes, allows users to customize their sites to fit any need, from simple blogs to complex e-commerce platforms using WooCommerce or Easy Digital Downloads. With a user-friendly interface and a robust community of developers and users, WordPress offers unparalleled flexibility and scalability, making it the preferred choice for millions of websites worldwide. Its significant market share is a testament to its reliability, ease of use, and the continuous innovation driven by its dedicated community, of which I consider myself a part.
This is a chart of WordPress market share from January 2018 till now: