Campaign spend limits

Spend limits define the maximum amount of money that can be billed for a specific Campaign for a given renewal period. This limit will be applied to all ad sets that are grouped under the campaign.

You can set up a spend limit when creating a campaign.
You can update a spend limit by editing a campaign.

If you want to control your spending, you can set a spend limit and a renewal frequency (daily, monthly, lifetime).  

• Daily is for a campaign to sunset after a specific day.
  Daily spend limit is the amount to be spent at a daily level. Renewed at 00:00 UTC every day.
  

• Monthly is for a campaign to sunset after a specific month.
  Monthly spend limit is the amount to be spent over the calendar month. Renewed on the 1st of every calendar month. This is highly recommanded vs daily as it allows Criteo to better optimize performances.
  

• Lifetime is for a specific/1 time only campaign to sunset at a specific time.
  Lifetime spend limit is the amount to be spent over the course of the campaign's lifetime. Will take into account total spend to date for all associated ad sets. Will not renew or reset.

Campaign spend limits are a good way to make sure multiple ad sets adhere to a total budget. However, as there are no pacing or delivery distribution for spend limits, spend will be allocated depending on the ad set budget settings. If no ad set budgets are set, spend will be allocated to the ad set with the highest demand or performance.