Implement hook_help()

!5 MR needs to be reviewed. Thank you.

+      $output .= '<li>' . t('Install the module "Node Save Popup".') . '</li>';

Instructions on how to install the module are not much helpful, once it is installed.

+ $output .= '<li>' . t('Go to the “Configuration. Eg:- Admin Menu >> configuration >> services >> Node Save Configuration') . '</li>';

There is no need to use an hyphen after a colon. The period is also wrong; a comma is better.

Thank you @apaderno,
I updated it according to your comment #5,
can you please review it?

I have verified and applied MR !5 on Drupal 9.5.8 version.
MR is applied successfully, and help() is added cleanly. Added screenshots for reference.

Can be moved to RTBC+1.