WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture...
Start by opening the page in a private browsing window and checking that your changes are published, rather than saved as a draft. If the issue only affects your browser, clear its stored data for the website or try another browser.
If other visitors also see the old version, check the application cache, any available hosting cache, and your CDN cache if you use one. Clear only the relevant cache and test again. For updated CSS or JavaScript files, use your application's asset versioning mechanism. Avoid permanently disabling every caching layer: caching can improve performance, and the underlying cause needs to be identified separately.