Learn how to read impression share, overlap rate and outranking data without chasing competitors or wasting budget.
Google Ads Auction Insights shows which other advertisers entered the same eligible ad auctions as you.
It can answer useful questions: Are more competitors appearing? Are you losing visibility? Does another advertiser often show above you?
It cannot tell you a competitor's budget, keywords, customers, revenue or profit.
The Simple Answer
Use Auction Insights to understand changes in visibility—not to copy competitors or chase the top position at any cost.
The report is available for eligible Search, Shopping and Performance Max campaigns. The exact columns differ by campaign type.
For Search campaigns, the report includes six main measurements:
- Impression share
- Overlap rate
- Position above rate
- Top of page rate
- Absolute top of page rate
- Outranking share
What Auction Insights Shows
Google compares your performance with other advertisers participating in the same auctions. You can view the data at available account, campaign, ad-group or keyword levels.
That makes it useful for diagnosing a change. If leads fall, the report can show whether visibility changed at the same time. It still cannot prove why customers stopped calling.
For a broader walkthrough of campaign reporting, watch Darlington's Google Ads Course.
Search Auction Insights Metrics
| Metric | Plain-English meaning |
|---|---|
| Impression share | The impressions you received divided by the impressions Google estimated you were eligible to receive |
| Overlap rate | How often another advertiser received an impression when your ad also received one |
| Position above rate | When both ads showed, how often the other advertiser appeared above yours |
| Top of page rate | How often an ad showed above the unpaid search results |
| Absolute top of page rate | How often an ad was the first ad above unpaid results |
| Outranking share | How often your ad ranked above another advertiser or showed when theirs did not |
These metrics describe auction visibility. They do not describe customer quality.
A Simple Report Example
Imagine your domain has these results:
- Impression share: 40%
- Competitor A impression share: 55%
- Overlap rate with Competitor A: 60%
- Competitor A position above rate: 70%
This means your ads received about 40% of the impressions Google estimated you were eligible to receive. Competitor A appeared in 60% of the auctions where you received an impression. When both ads showed, Competitor A appeared above you 70% of the time.
It does not mean Competitor A owns 55% of the market, spends 55% more or earns more customers. Each advertiser can have a different set of eligible auctions.
If Google estimated 20,000 eligible impressions for your settings and you received 8,000, the calculation would be:
8,000 ÷ 20,000 = 40% impression share
That example only explains your own impression share. Do not assume a competitor's percentage uses the exact same denominator.
Learn more about the calculation in Darlington's Search Impression Share guide.
What Auction Insights Cannot Tell You
The report does not reveal:
- A competitor's exact keywords
- Their bids or budget
- Their conversion rate
- Their cost per customer
- Whether their leads are qualified
- Their sales close rate
- Their revenue or profit
A competitor can appear above you and still run an unprofitable campaign. Higher visibility is not the same as a better business result.
How to Use Auction Insights
Compare Meaningful Dates
Compare equivalent periods and account for seasonality. A one-day change may be noise. A sustained four-week change is more useful.
Segment Before Reacting
Look by campaign, device or time where available. A competitor may be aggressive only in one service, location or hour.
Connect Visibility to Leads
If impression share falls but qualified leads and customer cost remain healthy, you may not need to act. If impression share and good leads both fall, investigate further.
Check Budget and Rank Separately
Lost visibility can come from budget or Ad Rank. Those problems require different fixes.
Review Search Quality
Before bidding harder, inspect the Search Terms Report. Paying more for poor searches creates more expensive waste.
Useful Decisions From the Report
Auction Insights can support decisions such as:
- Protecting a profitable service campaign during a competitive change
- Moving budget away from low-value searches
- Improving ads and landing pages before increasing bids
- Separating a crowded location from a less competitive one
- Checking whether a lead decline matches a loss of visibility
It should be one input, not the whole strategy.
Common Auction Insights Mistakes
Treating Impression Share as Market Share
It is share of eligible Google Ads impressions, not share of customers or revenue.
Bidding to Be Number One
The top position may cost more than the resulting customer is worth.
Assuming a Domain Is a Direct Competitor
Marketplaces, directories, manufacturers and businesses outside your ideal fit may enter the same auctions.
Making Changes From a Short Date Range
Small samples can swing sharply. Use enough data to see a pattern.
Ignoring Business Results
Always pair visibility data with conversion tracking, lead quality, closed customers and revenue.
Auction Insights FAQ
Why is Auction Insights empty?
The report needs enough activity. Google says it does not show insights when impression share is below 10% and may not report very small activity levels.
Can competitors see my Google Ads budget?
No. Auction Insights shows comparative visibility metrics, not exact budgets or bids.
Is a high overlap rate bad?
Not automatically. It only means another advertiser often received an impression when you did. The business outcome still matters.
Should I increase bids when a competitor ranks above me?
Only if the extra visibility can produce customers at an acceptable cost. First check search quality, ads, landing pages, tracking and business capacity.
How often should I check Auction Insights?
Monthly is enough for many small businesses. Check more often during a major promotion, seasonal change or sudden lead decline.
The Bottom Line
Auction Insights helps explain who shares your Google Ads auctions and how visible each advertiser is.
Use it to spot changes and ask better questions. Do not turn it into a race for the top position. The winner is the business that earns profitable customers, not the one with the highest impression share.
Sources
- Google Ads Help: Use Auction Insights to compare performance
- Google Ads Help: About impression share
Want Better Results From Paid Media?
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