You can plan your notification campaign by choosing the date and time for the start and end of your campaign. To improve the performance of your campaign, notifications are only sent between 7am and midnight.
A notification campaign with a low click-through-rate can be stopped by Facebook. Under some circumstances, the application can be unpublished.
This is why Nuke Suite will alert you when the click-through-rate for your campaign drops below 25% and will automatically pause your campaign when it goes below 20% – you can follow the rate in the campaign’s insights
Nota: notification is sent to application user if he did not access the application in the time frame of the campaign.