Impression Share
The percentage of eligible impressions your ads received out of the total available. Lost IS (budget) and Lost IS (rank) break down the two primary reasons for missed impressions and guide budget or bid decisions.
How Impression Share works in practice
Lost IS (budget) indicates that daily budgets are being exhausted before all eligible auctions are entered — the fix is increasing budget or reducing bids to stretch spend across the full day. Lost IS (rank) indicates that Quality Score or bids are too low to win auctions — the fix is improving ad relevance, landing page quality, or increasing bids in high-value segments. Tracking IS by campaign type and keyword priority ensures budget is concentrated in highest-ROAS segments. For brand campaigns, maintaining near-100% impression share is typically worth paying for, as competitors bidding on brand terms capture high-intent traffic cheaply.
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Let's talk →This term sits in the Paid Media category, which means it is most useful when evaluating paid campaigns, auction dynamics, targeting control, and media efficiency. The goal is not to memorize the label. The goal is to know when it should change a decision, a page, a campaign, or a measurement setup.
Related terms
Google's online advertising platform allowing businesses to display ads on Google Search, YouTube, Gmail, and the Google Display Network. Advertisers bid in real-time auctions where Ad Rank determines placement.
Google Ads' automated bid strategies that use machine learning to optimise for conversions or conversion value at auction time. Strategies include Target CPA, Target ROAS, Maximise Conversions, and Maximise Conversion Value.
The percentage of people who see your ad and click it. CTR = (Clicks ÷ Impressions) × 100. A strong CTR signals ad relevance; a weak CTR suggests misalignment between ad copy and audience intent.
Put Impression Share to work
Understanding Impression Share is one thing — operationalising it across tracking, acquisition, and conversion is another. Explore the full range of digital marketing services, including SEO & content consulting, paid media management, and analytics & CRO. Or work directly with a digital marketing consultant in Dubai on building growth systems that actually compound.
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