It is important to know which version your website is running on; this will help you create an update strategy for your website WordPress version. To check your website’s WordPress version, you need to have access credentials to your website’s backend. Here are 2 ways to know which WordPress version your website is running.
Log in to the WordPress dashboard of your website.
This is the easiest way. Look for the "At a Glance" widget on the dashboard. This widget displays the current WordPress version.
Another option is to use a plugin like "WP-System Health" or "Display PHP Version" to display the WordPress version and other system information.