When someone comments on the project card, all users on that project will be notified in notifications.
If however you are also tagged (with an @) in their comment, using smart annotation, you will receive a separate notification explaining that you have been mentioned in a comment on that particular project.
If you would like to receive an email notification when you are mentioned/tagged as well, you can also turn on this function by navigating to Settings-->Account-->Prefernces and turning on the function Notify me via email.
To learn more about notifications in SciNote watch our video tutorial.
Beneath you can see an example of email notification.