A: Yes, you can use it to hide the plugins and themes on the website:

https://hidemywpghost.com/hide-wordpress-website-from-theme-detectors-or-against-hackers/

https://hidemywpghost.com/how-to-hide-from-wordpress-theme-detectors/

It also provides an extra layer of security:

With Hide My WP Ghost you prevent attacks from happening, by hiding vulnerabilities in themes, WP core and plugins.

Hackers and hacker bots can't attack what they can't find.

It does a bit more, as you will see on the Features list: https://hidemywpghost.com/hide-my-wp-ghost-security-features/

This offers an extra layer of protection that you don't get from other plugins, because those focus on helping you while you are attacked and after you were attacked, by cleaning files, detecting malware, injections etc.

With Hide My WP Ghost you can avoid getting injections in the first place.