The short answer is, WordPress blog sites are free to use. However, there are some features and plugins that may require payment.
WordPress is a popular content management system (CMS) that powers millions of blogs around the world. WordPress is open source software, which means you can customize it to suit your needs.
There are also many paid plugins and themes available that offer additional features and functionality.
Overall, WordPress blog sites are free to use. However, if you want to use certain features or plugins, you may need to pay.