The Points Button is used to to display the Customer's Loyalty Points by Bucket Screen. This screen provides a "Show Loyalty Points" table view of the Customer's Earned, Redeemed, and Available Points by Points Bucket. This same table may be also be viewed by pressing [Ctrl+F4]) while viewing the Customer Lookup List. Loyalty Buckets are used to organize and identify Loyalty Rules that work together and to track Loyalty Points separately for different Rule sets.
See:
Customer Database - Main Screen Fields