The reward remains On hold until the advertiser processes the actions.
If the advertiser confirms an action, on the next day, the reward for it will become either Ready for withdrawal or Awaiting advertiser payment. Such actions will be registered as Confirmed or Awaiting advertiser payment in the reports.
If the advertiser declines an action, the reward won't be paid. In this case, funds will simply disappear from On hold. Such actions will be marked as Declined in the reports.