Custom imports let you bring a list from outside Opendate and turn it straight into a segment. Opt-in preferences travel with the list, so consent status is preserved rather than reset or lost in the upload.
Venues rarely keep every contact in one place. Spreadsheets, old email tools, and prior systems all hold names worth reaching. Custom imports bring that history into Smart Segments so an uploaded list sits alongside segments already built from purchases, gifts, and clicks, ready for the same email behavior and outreach tools without separate handling.