Read impression share and where it is lost
Impression share with its lost-to-budget and lost-to-rank components, per campaign.
IntentHow much of the available auction the account wins, and whether budget or rank loses the rest.
- 2
- Steps
- 1
- Tools
- 2
- Rules
- 1
- Failure modes
When to use it
Use it when
- Growth conversations: is there headroom.
- Competitor pressure suspicions.
Do not use it when
- On PMax, where impression share semantics differ: read placements instead.
What it needs first
Required
Preconditions
- The account is ticked in the dashboard, confirmed via list_accounts.
Inputs
window- Analysis window.Default: last 30 days.
Procedure
In order. Every tool named is one the gateway ships, and links to its reference.
Query impression share metrics per campaign.
Split losses into budget vs rank and rank campaigns by recoverable share.
Decision rules
The observable condition, what it lets you conclude, and what takes the conclusion back.
When
Share is lost mainly to budget on efficient campaigns
Conclude
Cheapest growth in the account: size it and route to budget-reallocation.
When
Share is lost to rank despite high bids
Conclude
Quality problem, not a money problem: the fix is ads and pages.
Evidence every conclusion must carry
- Every figure carries its account, metric and window.
- Anything below a readable sample size is reported as unjudged, not as zero.
Where the agent stops
- The readout changes nothing. Any change it motivates goes through Safe Writes: preview, human confirmation, then apply.
How it goes wrong quietly
The cases where the analysis is wrong and still looks right. Read them before trusting a number.
- Search 'top' vs 'absolute top' share answer different questions: name which one the claim uses.
What the answer contains
- 01Readout
- The figures, with windows and accounts named.
- 02Flags
- What deserves a deeper skill or a human decision.