Why are my Facebook ads not delivering?

First: read the actual delivery status

Ads Manager tells you more than 'Not delivering' — hover the status in the Delivery column. Sub-statuses like 'Learning limited', 'In review', 'Rejected', 'Account error', 'Not delivering: ad set schedule ended' each point to a different fix. Diagnosing from the exact sub-status saves you from changing things that were never broken.

The 10 causes, in the order to check them

• • 1. Learning limited — the ad set can't reach ~50 optimisation events a week (Meta's documented learning threshold), so delivery throttles. Fix: broader audience, higher budget, or optimise for a higher-volume event (e.g. Add to Cart instead of Purchase).
• • 2. Audience too narrow — stacked interests, tight geo and exclusions can shrink the auction pool below a workable size. Broaden targeting and let the algorithm find buyers; broad + good creative beats micro-targeting in 2026.
• • 3. Audience overlap — two ad sets bidding on the same people compete against each other; Meta pauses the weaker one's delivery. Consolidate overlapping ad sets instead of running near-duplicates.
• • 4. Budget or bid cap too low — with a cost/bid cap under the market clearing price you lose every auction and spend nothing. Raise or remove the cap; on tiny daily budgets, consolidate into fewer ad sets.
• • 5. Account spending limit / billing — a reached account spending limit, failed card or unpaid balance stops ALL delivery quietly. Check Billing & payment settings first — it's the most embarrassing and most common 'mystery' cause.
• • 6. Schedule settings — an ended end-date, a start date in the future, or dayparting on lifetime budgets blocks delivery while everything looks 'set up'.
• • 7. Still in review / rejected — most ads clear review within 24 hours, but re-edits send them back to the queue. Rejected ads don't deliver until fixed and re-approved; repeated rejections hurt account standing.
• • 8. Optimisation event never fires — if the ad set optimises for a Pixel/CAPI event that's broken or never happens on your site, Meta has nothing to optimise toward and delivery starves. Verify the event in Events Manager.
• • 9. Low ad quality / engagement-bait flags — ads flagged for clickbait, sensational language or high negative feedback get suppressed in the auction. Rework the creative rather than re-publishing the same one.
• • 10. Frequency saturation on a small audience — when a small audience has seen the ad many times, delivery naturally decays. Refresh the creative or widen the audience.

Fixes that make delivery problems stop recurring

Once delivery is unstuck, these prevent the next stall:

• • Consolidate — fewer campaigns and ad sets with bigger budgets exit learning faster and deliver more stably than many fragmented ones.
• • Let automation manage the auction — Advantage+ campaigns cut cost per acquisition by ~32% versus manual setups (Digital Applied, 2026) partly because they avoid the narrow-audience and cap mistakes above.
• • Keep creative rotating — fresh creative resets frequency decay; AI-generated variants averaged ~18% higher CTR in 2026 benchmarks (Digital Applied), and higher CTR improves auction competitiveness.
• • Watch it daily — delivery stalls silently (billing, learning, rejections). A daily automated check catches a stalled ad set in hours instead of weeks of wasted calendar time.