WordPress hosting requires you to have a server that complies with all the software and other technical requirements of the blog publishing tool. These are the software that is required in order to run the generic purpose WordPress based blog.
You can figure out whether or not a web hosting site complies with these requirements in different ways. One way to do this is to research for reviews and check if the site supports wordpress web hosting. But what WordPress.org recommends is that you send a query to the sites customer support team to verify if they had the minimum requirement.
To do this you can go to WordPress.org. Click on the About tab at the top of the page and then click on Requirements at the left side of the page. In the body of the page, a premade letter making this request is in a box. You just have to copy and paste it onto the email youre sending the web hosting site. Then you just need to wait for their confirmation.