How do I search for a list of contacts that are in one group and not in another?

If you want to search for a list of contacts that are included in a group A but not in a group B, you can use the Custom Search "Include/Exclude Contacts in a Group/Tag". This can be used to search contacts that meet criteria A but not criteria B.

Example: Find a list of contacts located in Denver, but who did not attend our Networking event.
1. Create a smart group of individuals located in Denver (group A) by conducting an Advanced Search.
2. Create a smart group of individuals who attended the networking event (group B) through an Advanced Search.

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Go to Search -> Custom Searches and select “Include/Exclude Contacts in a Group/Tag”. In the custom search, include group A and exclude group B: the result would be the individuals located in Denver who did not attend the networking event.

Hint: You can also combine this search that meets groups criteria with tags criteria.