If your Pinterest ads aren’t fully spending, it could be due to narrow targeting, where a small audience limits impressions. Low bids may also cause your ads to lose auctions.
Additionally, low engagement rates can reduce visibility, meaning you need better creatives and ad copy. A limited audience size may not generate enough impressions to spend the budget.
Finally, Pinterest’s pacing algorithm distributes spending throughout the day. To fix this, broaden targeting, increase bids, improve engagement, and ensure your audience size is sufficient.