Auction reports show who competes with you, how often they appear and in what position. They help understand the real competition, tell bid problems from quality problems and decide where it is worth fighting. Read sensibly, they are a strategy tool.
The essentials in a definition
Auction reports show who competes in the same auctions, impression share, overlap rate and relative position. They help understand whether lost impressions are due to budget, rank or competition. They link to relevance and Quality Score, bidding and market studies such as those from Think with Google.
What they show
Impression share, overlap rate, position above other advertisers and top-of-page rate. They indicate who contests the same searches and how strongly. In general they cover periods and segments you can filter.
They do not reveal competitors’ bids or budgets.
How to interpret them
Low impression share due to budget suggests raising budget. Low due to rank suggests improving quality, relevance or bids. A competitor with high overlap and better position is a direct threat. A new competitor that suddenly appears may explain cost increases.
Compare the evolution over time, not just one day.
Reading an auction report
- See impression share and reasons for loss
- Identify the most frequent competitors
- Compare evolution over time
- Decide where to reinforce, avoid or differentiate
What decisions to make
Decide where to reinforce (high-value terms with lost share), where to avoid (terms dominated by stronger competitors) and where to differentiate (messages and offers highlighting what the other lacks). Also guide brand and competitor strategy.
Avoid reacting to small variations: look for patterns.
The auction is a game with many players; the report shows who is at the table.
Cautions
Impression share is not a goal in itself. It can be expensive and barely profitable. Always align with return. Beware of automated campaigns, where detail may be lower. Respect competition and trademark rules when advertising against others.
Record what you observe and the decisions you take.
Decision table
| Indicator | Shows | Possible action |
|---|---|---|
| Impression share | How much of the eligible demand you get | Increase budget or rank |
| Lost to budget | Demand lost for lack of budget | Review budget where there is return |
| Lost to rank | Demand lost to low position | Improve quality and bids |
| Overlap and relative position | Direct competitors | Differentiate message and offer |
Common mistakes to avoid
- Reacting to every competitor change. Focus on those that affect your return.
- Wanting 100% share. It may be too expensive; choose where it pays.
- Ignoring the message. Position is not enough; the proposition also decides.
How to measure the result
Track impression share by campaign, causes of loss (budget and rank), cost per conversion and margin.
Limits and exceptions
Auction reports are aggregated and limited: they do not show competitors’ budgets, bids or strategies, and interpreting them takes care. Competition changes by hour, day and season. Combine them with conversion and margin data, and avoid drawing conclusions from short periods.
Illustrative example
Illustrative example: a company sees it loses 40% of impressions to rank on a profitable campaign and 5% to budget. Instead of raising budget, it improves the relevance of ads and pages and adjusts targets. Impression share rises and cost per conversion holds. In a less profitable segment, it stops seeking share.
In practice: checkpoints
Read the auction report as a map of who competes with you, how often and where you lose. Compare impression share, overlap rate and position over time, link changes to competitors’ promotions or to your own changes, and decide whether to compete, differentiate or avoid. Remember that the report shows relative position, not competitors’ budgets or profit, so use it to ask questions and run tests.
Frequently asked questions
Can I see competitors’ bids?
No. Reports show only competition metrics.
Is a high impression share always good?
Only if it is profitable. Always assess the return.
How often should I look?
Monthly, and when costs change sharply.
What impression share should I have?
The one profitability justifies; on brand campaigns it is usually high, on others it can be lower.
Can I see competitors by name?
Reports show domains competing in the same auctions, with no data on their budgets or strategies.
Auction reports show impression share, causes of loss and competitors; use them to decide where to invest or improve, not to chase 100% share.
Sources and recommended reading
Last editorial review: October 2026. Informational content; always confirm current conditions in the official sources before deciding.