Why did my campaign stop running?

A campaign stops for one of the reasons below. Check them in turn:

1. It has spent its budget. The campaign shows Needs budget. Delivery spends the budget you added and stops when it runs out. Tap Add budget and the campaign starts again on its own.
2. It was never funded. A campaign launched without budget shows Needs budget from the start and has delivered nothing. Add budget to start it.
3. The daily budget was reached. Once a day's budget is spent, delivery stops until the next day and then resumes by itself. A campaign that goes quiet each evening and returns each morning is following its daily budget.
4. It finished. A campaign shows Completed when its whole budget is spent or its end date has passed. Raise the budget, extend the dates, or use Republish (fresh copy) to run it again with a full budget.
5. It was paused, hidden or refunded. Ads stop as soon as a campaign is paused or hidden, and a campaign whose unspent budget you took back stops until you add budget again. Check the status and the Show ad toggle.

Stopping keeps everything: spend so far, results and settings are saved, and you pay only for views and clicks that were delivered.