Please follow the below method if you need to add a WWW to your site URL.
If you want to add WWW to your URLs, it’s really easy to do. Login to your Admin Panel > Settings > General – On this screen, the two fields you need are:
- WordPress Address (URL)
- Site Address (URL)
All you need to do here is add the WWW to your URL and hit Save.
You will need the “http://” part of the URL, too.