What is Impression Share in Google Ads?

Theoretically possible but rarely achieved or desirable for non-branded keywords. 100% IS requires bidding aggressively enough to win every eligible auction — which usually requires overpaying significantly. For brand keywords (defending your brand name) and high-value commercial queries, 90%+ IS is a reasonable target.

Search Impression Share measures your ad coverage on Google Search results pages. Display Impression Share measures coverage across the Google Display Network. They are calculated the same way (impressions received / eligible impressions) but have very different benchmarks: Search IS of 50–70% for non-branded is healthy. Display IS is typically much lower (5–20%) because the Display Network is vast and full coverage is neither achievable nor desirable. Focus on Search IS for performance campaigns; Display IS for remarketing campaigns where higher IS means your retargeting audience is seeing your ads consistently.

Two paths to higher IS depending on the cause: Increasing IS lost to Budget: (1) Increase daily budget, (2) Reduce bids to lower CPC and get more impressions per budget, (3) Narrow targeting to focus budget on highest-converting segments. Increasing IS lost to Rank: (1) Improve Quality Score — write better ad copy with higher expected CTR, improve landing page relevance, (2) Increase bids on most important keywords, (3) Add negative keywords to improve overall campaign relevance which boosts QS. Always diagnose the cause first (Budget vs Rank) before acting — increasing budget when the issue is poor Quality Score is wasteful.

Absolute Top Impression Share (ATIS) measures what percentage of the time your ad appears as the first ad above organic results — the most premium position on the page. ATIS is critical for: branded campaigns (own your brand name entirely — target 90%+ ATIS), high-commercial-intent keywords where being first matters for conversion rate, and competitive conquesting campaigns. Monitor ATIS alongside conversion data — if ATIS is high but conversion rate is low, the issue is with your landing page or offer, not your ad position. Use Target Impression Share bidding strategy if maintaining a specific position is more important than CPC efficiency.

Impression Share context is essential for interpreting campaign performance data: If clicks are declining but IS is stable, it likely means search volume for your keywords has dropped (market-level issue, not your campaign). If clicks are declining and IS is also declining, your campaign has a competitiveness problem (budget cut or Quality Score decline). If CPC is rising but IS is stable, market competition has increased. If CPC is rising and IS is increasing, you are winning more auctions (which costs more but may be justified). Always review IS alongside standard metrics — raw click and impression numbers without IS context can lead to misdiagnosed optimisation decisions.