Rescuing means to save leftover points until your next use year as opposed to using them or allowing them to expire.
This applies to your current use year through the following year. When rescuing points you lose certain booking options such as using your points for any Hilton hotel locations. Along with being unable to book with any Hilton hotel locations, there is also an additional fee associated with every time you attempt to rescue your points.
With rescued points you are still able to use them for Home Resort and Club reservations, as well as RCI exchange reservations. You only lose the ability to use them for your Home Week reservation, Hilton hotel reservations and Partner Perk reservations.
