Explanation
Run Once schedule type and Winner evaluation are two settings that should be selected before the admin can configure the Holdback percentage. Path Optimizer is a feature that allows marketers to test different paths in a journey and select a winner based on a specific metric. To use Path Optimizer, the admin needs to select a schedule type of Run Once, which means the journey will run only once for a single batch of contacts. The admin also needs to select a winner evaluation, which determines how long the test will run and how the winner will be chosen. After selecting these settings, the admin can configure the Holdback percentage, which is the percentage of contacts that will not enter any path until a winner is selected