Most marketers open the Auction Insights report once, feel vaguely informed, and close it.
That’s the problem. The report isn’t a scoreboard, it’s a diagnostic tool. And if you’re only reading it as a list of competitor names, you’re skipping the part where it tells you exactly where your budget is leaking and which rivals are responsible.
This guide breaks down all six metrics, explains the campaign-vs-ad-group distinction that most tutorials ignore, and gives you a real workflow for turning the data into bid adjustments, dayparting decisions, and device-level fixes.
What Is the Auction Insights Report in Google Ads?
The Google Ads Auction Insights report is a competitive analysis tool built into Google Ads that shows how your campaigns perform in the same auctions as other advertisers. It surfaces six metrics including impression share, overlap rate, and outranking share to help you identify where competitors are gaining ground and where you have room to reclaim visibility.
The report appears at three levels: account, campaign, and ad group. Most guides focus on the campaign level. That’s a mistake and we’ll come back to why.
According to Google’s own documentation (Google Ads Help, 2024), Auction Insights data is based on auctions where your ad was eligible to show, not all auctions. This is a critical nuance. A competitor appearing in your report didn’t necessarily beat you everywhere they beat you in auctions where you were already in the running.
What this means practically: a competitor with a high Overlap Rate but a low Outranking Share is showing up alongside you frequently but not consistently beating you. That’s a very different threat than a competitor who shows up less often but outranks you almost every time.
The Six Metrics What Each One Is Actually Telling You
Here’s where most Auction Insights explanations stop at definitions. Let’s go further.
Impression Share
Impression Share (IS) is the percentage of eligible impressions your ads received versus the total they could have received. If your IS is 62%, you’re missing 38% of eligible auctions either because of budget limits, low Ad Rank, or both.
Google splits lost impression share into two buckets: lost due to rank and lost due to budget. Check these in your campaign performance columns alongside Auction Insights they tell you why you’re losing, not just that you are.
Quick note: A high competitor IS doesn’t always mean they’re outspending you. It can mean their Quality Scores are stronger, which lowers their cost-per-auction and lets them appear more often for the same spend.
Overlap Rate
Overlap Rate shows how often a competitor’s ad appeared in the same auction as yours. An Overlap Rate of 80% means eight out of ten times your ad showed that competitor was also in the auction.
High overlap alone isn’t a red flag. It becomes one when paired with a low Outranking Share on your side.
Outranking Share
This is the metric that tells you who’s winning the head-to-head. Outranking Share measures how often your ad appeared in a higher position than a competitor’s or your ad showed and theirs didn’t.
If Competitor A has a 74% Overlap Rate with you and your Outranking Share against them is only 31%, you’re losing that matchup badly in three out of four shared auctions. That’s where to focus.
Position Above Rate
Position Above Rate answers: when both ads showed, how often did the competitor appear above yours? This metric, combined with Outranking Share, gives you a cleaner picture of positional dominance than the average position ever did.
Some experts argue that position above rate matters less for smart bidding campaigns since Google optimizes for conversions, not positions. That’s valid for fully automated Target CPA or Target ROAS setups. But if you’re running manual CPC or enhanced CPC, position above rate is still one of the most direct signals of bid competitiveness.
Top of Page Rate
Top of Page Rate shows how often your ad appeared in the top positions above organic results. Compare yours against a competitor’s. If they’re consistently hitting 85%+ and you’re at 52%, they’re dominating the premium inventory in your shared auctions.
Absolute Top of Page Rate
The strictest metric. Position one only the single slot above all other ads. For brand campaigns and high-commercial-intent keywords, this is often the number that matters most.
Or maybe I should say it this way: Absolute Top of Page Rate is the metric your CFO would care about if they understood paid search. It’s the clearest proxy for are we dominating our most important auctions?
Quick Comparison
| Metric | Best For | Key Benefit | Limitation |
| Impression Share | Gauging overall visibility | Shows scale of missed opportunities | Doesn’t reveal why IS is low |
| Overlap Rate | Identifying frequent rivals | Flags who’s consistently in your auctions | High overlap isn’t always a problem |
| Outranking Share | Head-to-head competitive analysis | Shows win rate vs. specific competitors | Doesn’t account for Quality Score differences |
| Position Above Rate | Positional benchmarking | Shows how often rival outranks you | Less relevant for smart bidding strategies |
| Top of Page Rate | Premium visibility tracking | Useful for brand and high-intent campaigns | Doesn’t distinguish between positions 1–3 |
| Absolute Top Rate | Brand dominance measurement | Clearest proxy for auction dominance | Low benchmarks vary by industry |
Campaign Level vs. Ad Group Level The Distinction That Changes Everything
This is what neither of the commonly cited tutorials addresses. And it’s where practitioners get burned regularly.
At campaign level, Auction Insights aggregates data across all keywords in that campaign. If your campaign contains 15 ad groups targeting different products or funnel stages, a competitor appearing at the campaign level might only be competing with you on two of those ad groups not all 15.
At ad group level, you see which specific keyword clusters are contested. This is where the actionable data lives.
Here’s the thing: a competitor might look weak at campaign level (say, 40% overlap rate) but be crushing you at 91% overlap on your highest-converting ad group. Campaign-level data would never surface that.
To access ad group-level Auction Insights in Google Ads:
- Navigate to your campaign
- Click into the specific ad group
- Select the Auction Insights tab from the left panel
Look, if you’re managing a multi-product or multi-funnel account, running Auction Insights exclusively at campaign level is like reading your bank statement total without checking which transactions hit. The number tells you something. The breakdown tells you everything.
👉 Google Ads campaign structure best practices
How to Use Auction Insights Data to Actually Improve Performance
To act on Google Ads Auction Insights data, follow these steps:
- Filter the report at ad group level for your top-converting ad groups.
- Identify competitors with high Overlap Rate and high Position Above Rate against you.
- Check whether your lost IS is due to rank or budget in performance columns.
- If rank: run an Ad Strength review and adjust bids or Quality Score inputs.
- If budget: reallocate daily budget to the hours when Outranking Share is lowest.
- Cross-reference competitor domains in SEMrush to assess their landing page and offer strategy.
Step 1 Diagnose Before You Bid
Reflex bidding is the most common mistake. Before touching bids, confirm what’s actually causing lost impression share. If it’s lost IS (budget), increasing bids does nothing — you’ll hit the budget cap anyway, just faster.
Run the Impression Share columns alongside Auction Insights. Budget-limited campaigns need budget fixes, not bid fixes.
Step 2 Prioritize the Right Rivals
Not every competitor in the report deserves attention. Focus on competitors who meet two conditions simultaneously: Overlap Rate above 60% AND Outranking Share above your own in the same matchup.
Spread attention too thin and you’ll optimize for noise.
Step 3 Apply Dayparting Based on Competitive Pressure
Auction Insights doesn’t show time-of-day data natively. But if you segment campaign performance by hour (using the Day dimension and filtering for hour-of-day), you can often identify windows where your CPC spikes a signal that competitor bidding pressure is highest.
Use ad scheduling bid adjustments to pull back during high-competition, low-conversion windows and push budget toward times where your Outranking Share historically improves.
Step 4 Use Device-Level Segmentation
Apply the Auction Insights view while filtering by device. Competitors often have very different mobile vs. desktop strategies. You might discover you’re losing impression share almost entirely on mobile and a device bid adjustment of +20% on mobile could close that gap without touching desktop bids at all.
Step 5 Cross-Reference With SEMrush
Auction Insights tells you that a competitor is dominating certain auctions.Google Ads Help Center, SEMrush tells you what keywords they’re targeting, what their ad copy says, and whether they’re running aggressive brand campaigns against your terms.
Tools like Optmyzr can automate this loop: set rule-based alerts that trigger when a specific competitor’s Overlap Rate exceeds a threshold, so you’re notified before it becomes a problem rather than after.
What Most Guides Get Wrong About Auction Insights
I’ve seen conflicting data on this. Some practitioners claim Auction Insights is only useful for large accounts with significant traffic volume. Others use it productively on accounts spending as little as £500/month. My read is that the report becomes reliable with enough auction data, which Google generally achieves at modest scale, but the ad group-level view requires tighter keyword clustering to produce meaningful signals.
The counter-intuitive insight: Most people assume a high competitor Impression Share means they’re outspending you. The data often says otherwise. A competitor with exceptional Quality Scores, strong landing page relevance, high expected CTR, tight keyword-to-ad match can achieve higher IS at a lower CPCs than you. The answer in that case isn’t to raise bids. It’s to improve Quality Score, which lowers your cost-per-auction and makes every pound of budget go further.
What most guides skip is the negative signal value: a competitor disappearing from your Auction Insights report is often more significant than a new one appearing. It usually means they’ve pulled budget, restructured campaigns, or abandoned a keyword cluster creating an opportunity to capture impression share at lower competition and lower CPCs. Monitor month-over-month changes, not just the current snapshot.
Auction Insights vs. Search Term Report: Auction Insights is better suited for competitive benchmarking because it shows how specific rivals perform in your exact auctions. The Search Term Report works better when diagnosing keyword match inefficiency or finding negative keyword opportunities. The key difference is scope Auction Insights looks outward at competitors; Search Term Report looks inward at your own traffic quality.
👉 Google Ads Search Term Report optimization
FAQs
Q: What does Auction Insights show in Google Ads?
A:The Google Ads Auction Insights report shows how your ads perform relative to competitors entering the same auctions. According to Google Ads Help documentation (2024), it surfaces six metrics including impression share, overlap rate, and outranking share to help advertisers understand competitive pressure, identify which rivals are most active in their auctions, and make data-driven bid and budget decisions.
Q: How do I improve my impression share using Auction Insights?
A:Start by identifying whether lost impression share is due to budget or ad rank; these require completely different fixes. According to Google’s guidance, rank-based IS loss signals a need to improve Quality Score or increase bids, while budget-based loss means reallocating spend. Auction Insights helps you pair this diagnosis with specific competitor pressure points at the ad group level.
Q: Is Auction Insights data available for all campaign types?
A:Auction Insights is available for Search, Shopping, and Performance Max campaigns, though the metrics and competitor visibility differ by type. Search campaigns provide the most granular six-metric view. Performance Max offers limited competitor transparency. I’ve seen conflicting information on exact PMax availability always verified in your specific account, as Google updates this periodically.
Q: What’s the best way to use Google Ads Auction Insights?
A: Filter it at ad group level, not just campaign level. Then look for competitors with high overlap rate and high position above rate against you; those are the matchups costing you the most. Fix rank or budget issues before touching bids.
Q: How do I find out why my impression share is dropping?
A: Check the Search Impression Share Lost (Rank) and Search Impression Share Lost (Budget) columns in your performance view. Pair these with Auction Insights to see whether a specific competitor’s increasing overlap rate coincides with your IS drop.
This guide covers Search and Shopping campaigns. Performance Max auction transparency is limited by design; a separate deep-dive is needed for that campaign type.