Ad ID is an identification number that’s generated for every Facebook ad or post after it’s been approved. It lets the user know who to contact with questions or problems about a specific advertising campaign.
One can view their Ad ID at any time inside “Account” > “Page Settings” > “Ads”. Once inside, every ad will display its unique Ad ID below its thumbnail. If you’re running multiple ads simultaneously, we recommend using separate Facebook pages for each so you can keep track of them individually–which also gives you more control over your targeting and budgeting!