What Does Auction Competition Mean in Ads Manager?

Meta’s help centre defines a metric called auction competition change. It compares today’s competitive bid with the average competitive bid of the previous 3 days. The competitive bid is the minimum bid you would have needed to win the auctions that were just out of your reach. Meta calls a change of more than 20% significant. The definition page lists no step for you to take.

That makes it a price signal. It fits when you want to know whether the cost of winning near-miss auctions moved. The definition does not say why your own spend or costs changed.

What does Meta’s definition say?

Meta’s page gives three pieces.

• The change. Auction competition change is the difference between the competitive bid on this day and the average competitive bid for the previous 3 days. Meta says it is “considered significant if it is over 20%”.
• The competitive bid. The minimum bid you would have needed to win the auctions that were just out of your reach. Meta describes these as the cheapest 1% of the winning bids in the auctions you lost.
• Meta’s example. If auction competition change is up 15.5%, there was a 15.5% increase in the price of the competitive bid.

As checked on 3 Oct 2026, the pages read do not say which Ads Manager view shows the figure. If you see it in your account, read it as a price movement: today against the average of the three days before.

How does Meta tie it to spending?

Meta’s page on the paced auction bid says the bid entered in the auction fluctuates during the day because of pacing, and that the paced auction bid shows the high end of those bids on a given day. It says that figure may rise over a campaign as you use the lowest cost options or when there is increased auction competition. If your bid and the paced auction bid are very close, Meta says this can indicate higher competition, meaning you might have trouble spending your full budget.

Meta’s pacing page gives an example. A lifetime-budget ad set starts in a period when results cost more because of increased auction competition. Without pacing, Meta says, the whole budget could go in a few days on expensive results. With pacing, budget stays available later in the week.

If you set a bid by hand, compare it with the paced auction bid where your account shows it. That is the comparison Meta describes.

Does Meta say what to do when it rises?

The definition page names no action. It links to three pages: ad auctions, pacing, and avoiding under-delivery.

Meta’s general page on the ad auction says that, to help your competitive positioning, you may want to consider raising your bid, and it recommends refining your targeting. It does not tie that advice to this metric. Meta’s page on high costs says that if costs are still too high after its other steps, you might be facing increased auction competition, and it points to its guidance on diagnosing and reducing auction overlap. As checked on 3 Oct 2026, the pages read do not give a response for a particular percentage, including a change above 20%.

Both options involve settings that Meta’s page on significant edits covers. Meta lists any change to targeting as a significant edit, which sends an ad set back into the learning phase. A change to a bid control or cost per result goal amount may or may not be significant, depending on its size. Before you edit, check the ad set’s Delivery column for Learning. For this figure alone, the pages read name no step.

Is it the same as auction overlap?

No. Auction overlap is when two or more of your own ads enter the same auction. Meta keeps the one with the highest total value, so your ads do not bid against each other. Auction competition change is defined from the winning bids in auctions you lost. Meta documents them on separate pages, though its page on high costs points from increased auction competition to its overlap guidance. To check overlap, use the entry linked below.

FAQ

Is a change over 20% a problem?

Meta says the change is considered significant if it is over 20%. It does not say a significant change is a fault, or that you must respond. As checked on 3 Oct 2026, the pages read tie no action to any percentage.

Do my costs rise when auction competition rises?

Meta’s page on the highest volume bid strategy says that strategy does not optimize for cost per action, so your cost may fluctuate. It adds that if auction competition increases, costs may go up, and if it decreases, costs may go down.

Who is competing with my ads?

Meta says that when there is an opportunity to show someone an ad, the ads whose target audience includes that person are eligible to compete. A person can fall into several advertisers’ audiences. The definition page does not name competitors.