You need to recover a deleted Facebook ad campaign because you will need different important information regarding that ad campaign at any time for marketing purposes and also for billing purposes. You can have help from there to run other Facebook ads. If you delete an ad its billing details will also be deleted. If you haven’t made all the payments yet, you won’t get that billing information unless you recover that ad. The billing information sent to you from Facebook and billing information available with you in your Facebook ad accounts will be different. So, then you can become confused.