List A
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Supports: .txt, .csv
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List B
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Supports: .txt, .csv
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A Only 0
No comparison performed yet
A & B (Intersection) 0
No comparison performed yet
B Only 0
No comparison performed yet
A OR B (Union) 0
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NOR (Neither A nor B) 0
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Understanding Your Results
A Only
Items that exist only in List A and are not present in List B.
Example: If List A contains customer emails and List B contains newsletter subscribers, "A Only" shows customers who haven't subscribed to your newsletter.
A & B (Intersection)
Items that exist in both List A and List B - the common elements between the two lists.
Example: If List A contains website visitors and List B contains email subscribers, "A & B" shows visitors who have also subscribed to emails.
B Only
Items that exist only in List B and are not present in List A.
Example: If List A contains current customers and List B contains leads, "B Only" shows leads who haven't become customers yet.
A OR B (Union)
All unique items from both lists combined - no duplicates, just the complete set of all items.
Example: If List A contains email subscribers and List B contains social media followers, "A OR B" gives you your total unique audience across both platforms.
NOR (Neither A nor B)
Items that are completely absent from both lists - this represents the complement of the union when compared to a reference set. Enable the NOR function and provide a reference set to use this feature.
Example: If List A contains active users and List B contains premium users, and your reference set contains all registered users, "NOR" shows users who are neither active nor premium (inactive free users).