Abillity to see overlap of 3-4 audiences

[#1]

Description - Ability to see how HCPs overlap in 3 - 4 audiences

Why is this feature important to you - We have some of the same HCPs who would be seeing patients for diabetes, obesity and liver problems

How would you like the feature to work - by seeing the overlap, we could determine how to communicate with the HCPs without spamming their inbox

Current Behaviour - we  have to choose days when emails are sent out or create various business logic to minimize the opportunity to send multiple emails on the same day. It is sometimes hard because we send emails daily.

[#2]

the current option is to see overlap of two audiences at a time. The overlap has to be done starting with a control group and then choosing the second audience a couple of times to ballpark the overlap.