In order to better understand, I will create with you a new actor which will use a Replicated Health Bar.
- Go in :
 
- Content → Replicated Health Bar → Blueprints
 
- Right click in your content browser
 

- A new window will appear, click on “Blueprint Class”
 

- Create a new actor by clicking on “Actor”
Note : It works with everything that inherits from actor
 

- Double click on the new blueprint to open it.
 

- We will now add your Health bar, in the components tab of the blueprints, click on the “Add button”.
 
