If you make any changes and if they are not showing on your WordPress website, then this issue might be caused because of the cache functionality.
You need to clear your WordPress website cache in order to see the changes that you have made. WordPress cache is situated in a folder : /wp-content/cache/
You must delete the content of cache/ folder. This can be done either through FTP or through File Manager in cPanel. After this, clear the cache of your web browser as well and access your website again.