Guide
How do I increase search impression share in Google Ads?
What search impression share measures, the formula, how to tell searches lost to budget from searches lost to rank, and which are worth winning back.
The manual way comes first, in Google Ads itself. Then the same problem as Goldbeater finds it, every week, without anyone asking.
Last checked 26 September 2026
- Search impression share is the impressions you received divided by the impressions you were eligible for, as Google estimates them.
- Google splits the searches you missed into two columns: Search lost IS (budget) and Search lost IS (rank).
- More budget only wins back the first kind. The second is won with a higher bid or a better ad and landing page, which is what Ad Rank is made of.
- Win back only what pays. A campaign losing to rank while converting below the rest of your account is losing auctions it shouldn't want.
Impression share is how often you showed, out of the times you could have.
Google’s formula is short: impression share is the impressions you received divided by the total impressions you were eligible for. The eligible figure is Google’s estimate, and it rests on your targeting, your ads’ approval and their quality.
A campaign that received 6,000 impressions out of an estimated 10,000 it was eligible for has a search impression share of 6,000 ÷ 10,000, or 60%.
For Search, three columns do the work. Google defines them this way:
- Search impr. share is the impressions you received on the Search Network divided by the estimated number you were eligible to receive.
- Search lost IS (budget) is the percentage of time your ads weren’t shown on the Search Network because the budget ran short. It’s reported for campaigns only.
- Search lost IS (rank) is the percentage of time your ads weren’t shown because their Ad Rank in the auction was too low.
The split says what would win the missing searches back. Budget buys back the first kind. Only Ad Rank wins the second, and Google builds Ad Rank from your bid, the quality of your ads and landing page, the thresholds an ad must clear, the competition in the auction, the context of the search, and the expected effect of your assets.
How to read it in Google Ads
- Go to Campaigns › Campaigns.
- Select the columns icon above the table, then Modify columns.
- Open Competitive metrics and tick Search impr. share, Search lost IS (rank) and Search lost IS (budget). Select Apply.
- Set the date range to the last 30 days. Google says these figures can take 24 to 48 hours to update, so the last two days may still move.
- Put each campaign’s return beside them: cost per conversion, or conversion value over cost, whichever your account is run on.
Then read each row as a sentence: of the searches it could have shown on, the campaign showed on this share, and missed this much for budget and this much for rank.
| Campaign | Search impr. share | Search lost IS (budget) | Search lost IS (rank) | Return |
|---|---|---|---|---|
| Brand — Exact | 94% | 2% | 4% | 9.10× |
| Sofas — Phrase | 48% | 34% | 18% | 3.20× |
| Beds — Phrase | 41% | 6% | 53% | 5.10× |
| Rugs — Broad | 22% | 3% | 75% | 1.20× |
Win back the searches that pay, and let the rest go
Lost to budget. If the campaign meets its target and you’d buy more at that price, raise the budget. Filter the campaigns table by Status to Limited by budget, and the chart icon beside each one shows Google’s budget options.
Lost to rank, in a campaign that pays. Google names two ways to improve Ad Rank: improve the quality of your ads and landing page, or increase your bid.
- On a target-based strategy, loosen the target a step: a higher target CPA, or a lower target ROAS, lets bidding pay more for these auctions. Expect a Learning status for a while after the change.
- On manual bids, raise the bids on the keywords that convert.
- On the ads and the page, write headlines that answer the search and send it to a page about what was searched. Google says higher quality ads can often lead to lower costs per click, so this is the fix that can make the clicks cheaper too. Reading Quality Score shows which part to work on.
Lost to rank, in a campaign that doesn’t pay. Leave it. The auction is turning down a bet that loses money, and winning more of those searches would lose more.
What it looks like when Goldbeater finds it
Goldbeater reads each enabled campaign’s impression share over the last 30 days, once it has spent on at least 14 of them, so a new campaign isn’t judged while its bidding is still learning. It raises a finding when a campaign loses at least 20% of its search impressions to rank, more than it loses to budget, and is at least as efficient as the account’s median campaign. It marks it medium at 50% lost to rank.
It drafts no change. Whether to loosen a target, raise bids or rework the ads turns on things the account doesn’t show, like your margin, so the finding gives the figures and says where to start. A campaign losing to budget raises a different finding instead, and a campaign raises at most one of the three.
Beds — Phrase loses 53% of impressions to ad rank
Beds — Phrase
53% to rank and 6% to budget · more budget would not buy these; bids, the target or ad quality would · ROAS 5.10 against the account's typical 4.15 · ROAS 5.10 against a 4.50 target
A campaign that converts, losing a large share of its searches to ad rank rather than to budget. A bigger budget won't win those back; better bids, ads or landing pages can.
It meets its own target and misses these searches on ad rank. Lowering the target a step lets it bid for more of them; stronger ads win some back at the same bid.
No single setting fixes this, so Goldbeater drafts no change. The steps under What to do are the fix.
Questions
- What is the search impression share formula?
- Impressions received on the Search Network, divided by the impressions Google estimates you were eligible to receive. 6,000 of an estimated 10,000 is 60%.
- What’s a good search impression share?
- There isn’t one number. A share is only worth raising where the searches you’d win would pay, so read it beside the campaign’s return, not on its own.
- Why is Search lost IS (budget) missing on my ad groups?
- Google reports it for campaigns only. It also leaves Search lost IS (rank) off the ad groups page if the campaign ran out of budget at any point in the date range.
- Why does impression share show a dash?
- Google says a dash can mean there isn’t enough data yet, from low traffic or new keywords, and that the figures take 24 to 48 hours to update.
How Goldbeater checks this
This check runs on every weekly review.
Each finding carries its evidence and, where the problem costs money, an estimate of how much a month. Where a setting can fix it, Goldbeater drafts the change, and it reaches your account when you approve it and press Apply.
Searches lost to ad rank on a campaign that pays
Google's own pages
Where the manual method comes from.
More guides
Other things worth checking by hand.
- How do I audit a Google Ads account?A Google Ads audit checklist: 24 things to check, what to look for in each, and where to find it in Google Ads, menu by menu.
- How do I find and remove duplicate keywords in Google Ads?Google serves one copy of a duplicated keyword and picks which. How to find duplicates across ad groups, decide which copy to keep, and remove the rest.
- How do I find the search terms wasting my Google Ads budget?Find the search terms that cost money and never convert, add them as negative keywords without blocking your own keywords, and check what changed.
- How do I check that my Google Ads conversion tracking is right?How to test Google Ads conversion tracking: find the actions that stopped recording, the conversions counted twice, and the settings bidding reads.
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