If you've noticed that your approved Facebook ad isn't spending as expected, there could be a few reasons behind it. Here's a step-by-step guide to help you troubleshoot the issue.

Keep an eye on your campaign performance graph. If you notice a sudden crash or if conversions drop to zero, it's likely that your campaign isn't spending money.

Lack of impressions on your ads indicates a serving issue.

Common Reasons:

1. Spending Limit Reached or Payment Method Issue:
If your ad account has reached its spending limit or there's a problem with the payment method, Facebook will stop spending money, and your ads won't be shown to your audience. Check your billing status in Facebook Business Manager.

2. Ad Rejection or Under Review:
Facebook reviews all ads before they go live to ensure they comply with advertising policies.
Refer to Facebook Transparency Policies for more information.

Other Possible Causes:

1. Low Offer:
Facebook determines ad placements based on bid, audience likelihood to act, and ad relevance and quality.

2. Difficult Optimization Goal:
Your campaign's optimization goal influences Facebook's ad delivery. Ensure it aligns with your objectives for best performance.

3. 20% Rule Violation:
Ads with excessive text in images may have limited reach. This includes logos, watermarks, and taglines.