Remediation target notification. Summary email?

Dear community, 

From the doc I can read that "A summary email, per remediation target rule, is sent when one or more vulnerable items are either approaching its remediation target date or the remediation target date has passed."

What does it mean exactly that a 'summary email' is sent? One of my concern is that users will receive 1 email for each VIT approaching the date. As we am implementing this for a large organization, users might be flooded with emails if this is the case. Does anyone have direct experience with this?