Once you create a Facebook Ad, expect it to take at least 24 hours before it’s approved. Although this is the officially-communicated duration it takes for your ad to be approved, it could take longer than this. The review process is meant to ensure that ads comply with advertising policies. Before submitting your ad, check it for illegal content, discriminatory practices and excessive text in ad images. Check out Facebook’s advertising policies for more information. If you change your targeting options, content, optimization or billing event, the review process will start afresh. This means waiting at least 24 hours after making the changes. If your ad has not been approved after 24 hours, you can contact support using email or chat.