The Customers In rule allows you to include or exclude contacts based on strategic segments defined in Campaign. You can refine the scope of this rule to affect only a particular channel or a particular offer or offer lists defined in Campaign.

Use this rule to enforce global suppression across all participating campaigns. For example:

To create ‘do not contact’ lists or to support global control groups (could be channel-specific)

To prevent customers who have opted-out of a given channel from receiving messages on that channel

To prevent customers with a particular characteristic (in default, poor credit rating, returning too many products, etc.) from receiving a list of particular offers (highest value offers, expanded credit lines, and so on) or any individual offer.

You might have a segment called "DoNotCall" representing the highest value customers that have requested not to be contacted by phone. Use this rule to ensure all individuals in the "DoNotCall" segment do not receive any telemarketing offers.