A metric indicating the percentage of missed impressions because the ad rank was lower than required to appear.
Advertisers managing Google Ads campaigns who read about bids, quality score, and budget constraints.
01What it is and how it works
The metric calculates the ratio of impressions that were not served to the total eligible impressions, where the primary reason for not serving was a low ad rank. Google Ads determines ad rank by combining your bid, quality score, and the expected impact of ad extensions. When your ad rank falls below the threshold required for the auction, the system awards the impression to a competitor. The lost impression share (rank) isolates the portion of lost impressions specifically attributable to rank, excluding budget or other constraints.
It tells you how often your ad didn't show up because it ranked too low.
02What to do about it
To improve your lost impression share (rank), start by reviewing your keyword bids and increasing them for terms where the metric is high. Next, work on your quality score by improving landing page relevance, click‑through rate, and ad copy. Use ad extensions such as sitelinks or callouts to boost the expected impact and raise your effective ad rank. If you have a limited budget, consider raising the daily budget or using a shared budget pool to allow more impressions when rank is sufficient.
03How it is measured or noticed
You can find this metric in the Google Ads interface under the “Keywords” or “Ad groups” tab, in the column labeled “Lost Impression Share (Rank)”. It appears as a percentage. A high value (for example, above 30%) signals that rank is a major factor in lost impressions. You can also export the data to a spreadsheet and compare it against “Lost Impression Share (Budget)” to see which constraint is limiting your reach.
04Common mistakes
- Confusing lost impression share (rank) with lost impression share (budget) and treating them as interchangeable.
- Assuming that raising bids alone will solve the problem without addressing quality score.
- Ignoring the metric because it seems small, when it can accumulate to significant lost traffic over time.
- Focusing only on the aggregate number and not segmenting by keyword or ad group to find specific opportunities.
05Limits
This metric only reflects losses due to rank; it does not capture losses from other factors such as budget caps, ad schedule restrictions, or frequency caps. It is also specific to the Google Ads platform and does not apply to other advertising channels. Additionally, the metric is only available for campaigns that have sufficient impression data; very small accounts may see blank or unreliable values.
06Worked example
Suppose a campaign had 10,000 eligible impressions and received 7,000 impressions. The lost impression share (rank) is reported as 20%, meaning 2,000 impressions were lost because the ad rank was insufficient. By increasing the bid for the main keyword from $1.00 to $1.30 and improving the landing page load time, the quality score rises from 5 to 7, and the lost impression share (rank) drops to 8%, resulting in approximately 1,200 additional impressions.
Frequently asked questions
How is Lost Impression Share (Rank) different from other lost impression share metrics?
Lost Impression Share (Rank) specifically measures missed impressions due to low ad rank, unlike other metrics that track losses from budget limits, ad scheduling, or frequency caps. It isolates rank-related visibility gaps in Google Ads.
Should I increase keyword bids to improve my Lost Impression Share (Rank)?
Yes, increasing bids for keywords with high lost impression share can improve visibility, but this depends on your budget and ROI. Prioritize high-value keywords where the cost of higher bids is justified by potential gains.
How is Lost Impression Share (Rank) measured in Google Ads?
It is displayed in the Google Ads interface under the 'Keywords' or 'Ad groups' tab in the column labeled 'Lost Impression Share (Rank).' It calculates the percentage of eligible impressions not served due to insufficient ad rank.
Does Lost Impression Share (Rank) still reflect accurate data in Google Ads?
Yes, it is a valid metric provided by Google Ads, but it only captures losses from ad rank, not other factors like budget constraints or scheduling. It is most useful for diagnosing rank-related visibility issues.
What happens if I ignore high Lost Impression Share (Rank) values?
Ignoring it may result in reduced ad visibility, lower click-through rates, and missed opportunities for conversions. You might notice this as declining performance in campaigns where the metric is consistently high.
How long does it take to see improvements after adjusting bids for Lost Impression Share (Rank)?
Improvements can take a few days to weeks, depending on auction competition and bid adjustments. Monitor the metric and related KPIs like impressions and conversions to gauge progress.
Asked out loud
spoken, not typedThe same term in the words somebody uses speaking to an assistant rather than typing into a box — written from the situation, which is why each one carries the situation it came from.
Check your Lost Impression Share (Rank) metric in Google Ads to confirm if low ad rank is the issue. Increase bids for underperforming keywords, but balance this with your budget to avoid overspending.
Review your Lost Impression Share (Rank) to see if insufficient ad rank is limiting visibility. Adjust bids or improve ad quality to boost your position in the auction, especially for high-priority keywords.
It shows the percentage of impressions missed because your ad rank was too low to appear. To improve it, increase bids or enhance ad quality for key keywords, ensuring your budget supports these changes.