Definition
Search Lost IS (Rank) is a Google Ads metric that shows the percentage of time your ads were not shown on the search results page due to ad rank limitations. Ad rank determines the position of your ad based on your bid, ad quality, and expected impact of extensions and other ad formats.
How It Works
- Impression Share (IS) = Impressions received ÷ Impressions eligible
- Search Lost IS (Rank) = Percentage of eligible impressions lost because your ad rank was too low
- Factors affecting ad rank include:
- Max CPC bid or target bid (depending on bidding strategy)
- Ad quality (relevance, CTR, and landing page experience)
- Expected impact of ad extensions and formats
A high Search Lost IS (Rank) means your ads are eligible but fail to show due to lower rank compared to competitors.
Why It’s Important
- Identifies whether ad performance is limited by quality or bidding
- Helps prioritize improvements in ad copy, keywords, or bids
- Supports strategies to increase visibility and competitiveness in search results
How to Optimize
- Improve ad relevance and quality score – make headlines, descriptions, and landing pages highly relevant to your keywords.
- Adjust bids – increase bids for high-priority keywords to improve ad rank.
- Use ad extensions effectively – they enhance ad rank and CTR potential.
- Regularly monitor competitor activity – higher competition may require bid or quality adjustments.
By managing factors that influence ad rank, advertisers can reduce Search Lost IS (Rank) and increase the likelihood their ads appear in top positions.