What is Contact Email in Email Alerts?

What is Contact Email in Email Alerts?

Hi All,

I am trying to create Email alerts and there is a field 'Email Recipients". Now I want to trigger email alerts to the customers. 

I can see below options, where I believe Contact Email is the client contact email. is that correct?


Reason I am asking is, workflow is triggered, and I can see that in the history section of the estimate. And for confirmation, I added my personal email in the bcc section. But I dont see any emails triggered. So not sure if I am doing anything wrong here.

Regards,
Manjyot