When you set a lifetime budget, you're telling us how much you're willing to spend over the entire run-time of your ad set. You won't be charged more than your lifetime budget for your ad set's results.

If you're using standard delivery (which we recommend for most advertisers), we strive to spend your budget evenly over your ad set's lifetime. However, we don't guarantee that we'll spend the same amount every day because we may be able to get you better results on certain days. For example, if your ad set is running for five days and has a GBP 250 lifetime budget, we may spend GBP 50 on each of the first two days. Then, on the third day, lots of results are available, so we spend GBP 75. On the fourth day, there aren't as many good opportunities, so we only spend GBP 25. On the fifth day, we spend GBP 50.

Warning: If you use accelerated delivery and a lifetime budget, it could all be spent in less than a day.

* Nguồn: Facebook