A hellobar notification is something which appears above the header. It is very useful functionality and can be implemented very easily in WPLMS.
refer screenshot : https://prnt.sc/qz2al8
Copy and Past this code in your child theme : https://gist.github.com/MrVibe/5e3627782208ce68eb7664c6c4a2fb52
A setting is added in WP admin – WPLMS – Header area where you can add notification content.