Using a percentage allows you to only apply rules to a subset of users. This is useful if you want to roll out a feature to a small percentage of users first and then increase it over time. Adding a percentage to a flag can be done in the top half of the flag editor. Percentage The percentage is applied to the flag before the rules are evaluated. If the percentage is 80%, the flag will be evaluated for 80% of the users and disabled for the other 20%. Set the percentage to 0 or click the small trash icon to remove the percentage. If no percentage is set, the flag will be evaluated for all users.