Google Ads · Impression share

Why is my Google Ads impression share dropping?

Google Ads search impression share drops for two reasons Google reports separately: budget, when the campaign runs out of money, and rank, when bids or quality are not enough to win the auction. Adstudio reads both lost-share figures for each Search campaign over time, so you can tell which one grew and whether more budget or better rank is the answer.

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The numbers that matter

What to read first.

Search impression share: The share of eligible impressions the campaign actually got.
Search lost IS (budget): Fix with budget, or by narrowing what the campaign spends on.
Search lost IS (rank): Fix with bids, targets, Quality Score and ad relevance.

The method

How to break it down.

01Read impression share and both lost shares per Search campaign, now and in the previous period.
02See which lost share grew.
03If rank, look at keywords' Quality Score and recent bid or target changes; if budget, look at whether the campaign earns its extra budget.

How Adstudio answers it

In the app, or from the AI you already use.

In the Adstudio assistant

The assistant reads impression share, lost to budget and lost to rank, per campaign and over time, and reads Quality Score and its components on keywords. It can prepare a budget change on the verified path for you to confirm.

From ChatGPT or Claude, over MCP

Over MCP, query_performance returns search impression share, budget-lost and rank-lost impression share at campaign level, for any period, to ChatGPT or Claude.

list_accounts
query_performance

Prompts

Copy one and ask.

“Which Search campaigns lost the most impression share to budget last month?”
“Is our impression share drop caused by budget or rank? Compare the last 30 days with the 30 before.”

Limits

What Adstudio will not tell you.

Auction insights (who you lose to) are not in Google's API, so Adstudio does not name competitors.

FAQ

Questions people also ask.

Search impression share is reported for Search campaigns. Adstudio reads it there.

Only if the campaign is profitable at the margin. Adstudio shows the lost share next to the campaign's own CPA or ROAS so you can decide.

Creating an account costs nothing, but connecting an ad account needs a paid plan: Hobby at $19 a month, or Business at $39 per workspace a month. There is no trial, and the price does not depend on your ad spend.