Commander - In case you are unfamiliar with the "term" of "Whitelist" here is a definition (from Wikipedia).
A whitelist is a list or register of entities that are being provided a particular privilege, service, mobility, access or recognition. Entities on the list will be accepted, approved and/or recognized.
Whitelisting is the reverse of blacklisting, the practice of identifying entities that are denied, unrecognised, or ostracised.
Hope that helps you understand better.