
https://success.salesforce.com/answers?id=9063A000000pEWWQA2
1 answer
Hi Susan,
A Publication List is used to manage subscriber-level opt-ins and -outs for data extension sends. This essentially acts like a list when doing a send to a data extension, keeping unsubscribes at the Publication List/Data Extension level. You can also import to a Publication List to add unsubscribes only.
https://help.exacttarget.com/en-US/documentation/exacttarget/subscribers/publication_lists/
Hope that helps.
Regards,
Jayson