Codes are discounted rates for reservations. Some are for anyone and some are sent to individuals, only to be used by those people. General codes (for everyone) are posted on this board. When you call reservations you give them the three letter code and they can tell you what resorts and days they can be used for. Some codes come out saying for value resort and give those prices but CRO can usually apply them to discounting any level resort. Some discounts are only for people with annual passes, some for people who have a disney visa. You cant depend on the CM to tell you the best rate when you call, be armed with any code you find and ask them to check. Hope that helps.