The cut-off point is typically determined by a plastic card or by the dealer inserting a marker at a specific place in the deck. This section of the deck is not dealt in the round. By cutting off a portion of the deck, the dealer ensures that the remaining cards are shuffled or dealt while maintaining randomness and preventing card counting.
Cut Off Example
For example, if the dealer cuts off the last 20% of the deck, that portion will not be used during play until the next shuffle.