When you start your campaign, you are eager to see the first results, so waiting can cause certain discomfort. However, keep it in mind that it normally takes Facebook up to 24 hours to approve the campaign, although in some cases it may take longer than that. The delay, among other things, can be explained by a big queue of ads awaiting approval from Facebook.
Once your campaign is active, you will immediately receive an e-mail, so you don’t have to worry about missing this moment.
If it’s been more than 48 hours and your dashboard still shows “In review” status, please, contact Support by clicking on a blue circle in the bottom right corner of the page — we’ll be happy to help.