By Corey Frankosky · Last Updated

What Is Impression Share?

Impression share is the percentage of times your ad actually showed, out of all the times it was eligible to show. If your ads could have appeared 10,000 times and showed 3,000 times, your impression share is 30%. Google also tells you whether you lost the rest to budget or to Ad Rank.

Google's Definition

"Impression share (IS) is the percentage of impressions that your ads receive compared to the total number of impressions that your ads could get."

Source: Google Ads Help.

Lost Impression Share: Budget vs Rank

The two columns next to impression share tell you why you missed out. Each one points to a different fix.

  • Lost IS (budget): Your daily budget ran out before the searches stopped.
  • Lost IS (rank): Your Ad Rank was too low to show, because of your bid, your ad quality or both.

Impression Share Example

Example

Your campaign was eligible for 10,000 impressions last month and received 3,000. Your impression share is 30%. If lost IS (budget) is 50% and lost IS (rank) is 20%, more budget is the bigger opportunity.

Why It Matters

  • It shows the size of the opportunity: Low impression share means people are searching for you and seeing your competitors.
  • It tells you what to fix: Budget and rank losses call for completely different changes.
  • It protects your brand: Your branded campaigns should hold a very high impression share.

How to Improve It

  1. Fix rank losses first. Better ads and landing pages raise Ad Rank without raising costs.
  2. Narrow before you spend more. Cut weak keywords and locations so your budget lasts longer.
  3. Add budget where it converts. Raise budgets only on campaigns that are profitable and losing to budget.
  4. Use the right bid strategy. Target impression share bidding makes sense for brand campaigns, not most others.

Watch: Impression Share Explained

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Question to AnswerIs your main campaign losing more impression share to budget or to rank, and what is the first change you will make because of it?
  • Ad Rank: The set of values Google uses to decide whether your ad shows and where it appears.
  • Quality Score: Google's 1 to 10 rating of how relevant your keyword, ad and landing page are.
  • Smart Bidding: Google's automated bid strategies that use AI to bid for conversions or conversion value in every auction.
  • Cost Per Click (CPC): The amount you pay each time someone clicks your ad. The 2026 all-industry median is $5.42.

Go Deeper

If you are losing impression share to rank, read How to Fix Low Ad Rank in Google Ads.

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