You can set a “lookback window” for both computed traits and audiences, which limits the period of time in which data is considered when calculating the trait or audience. For example, you might set a lookback window of 7 days on an audience or trait like new_users_7_days, but you would not add a lookback window to a trait that isn't time-bounded, for example lifetime_value .

When you specify a lookback window, Engage updates the audience or trait hourly. If you do not specify a lookback window, Engage continuously updates both computed traits and audiences in real time.