How to customize email body of the alert

Using this image from a different post

How can I alter this B0 or B1? Use a different expression other than Classis condition? like Reduce or Math? To be brief, what I’m trying to understand is how do i say server=503 or Ram=503, Instead of B0=503 or B1=503.

In other words, how to customize email body of the alert that I’m sending?

I know I’m not providing much info, but please share anything you might’ve encountered on this topic.

Use notification template(s) to customize content of the alert:

Thank you for sharing that, it was helpful but still my question is unresolved, I’ll try to explain better what I’m confused about, how do I change the B0 to say RAM. Under Alerting rule - Expression, if I pick anything like Classic condition, Reduce, Math, it gives the values B0 or B1 in email, how would I in Math Expression say RAM $A > 70?

Alert: define meaningful annotation, e. g. description
Notification template for email: show that description annotation (and don’t show all that default “rubbish” which has no meaning for your case.

Use unified alerting doc to understand all topics - it’s very complex, because it has powerfull design.