The Marketing Setup table contains information about the way you want the program to manage certain aspects of your contacts.
This table contains:
the method you want the program to use to search for duplicate contacts.
the information the program will copy from a company's contact card to the contact cards of the persons working for this company.
the default information the program will use when you enter a new contact (default salesperson, territory, country/region and territory settings), a new opportunity (default sales cycle settings) or a new sales or purchase document (default virtual customer number settings).
the place the program will store attachments.
information about the synchronization with customer, bank accounts and vendor records.
the numbering of contacts, segments, opportunities, campaigns and to-dos.