Search Impression Share

What AdGradr checks

AdGradr separates impression share (IS) loss into two distinct categories because the fix is completely different for each. This is one of the most important checks in the audit.

Three conditions are evaluated:

• 30%+ impression share lost to budget. Your campaigns are running out of money before the day ends.
• 30%+ impression share lost to rank. Your ads are not competitive enough to show. Skipped for Smart Bidding campaigns (see below).
• Brand campaign with less than 80% impression share. Competitors are capturing searches from people already looking for you.

Brand campaign detection uses the same brand pattern builder as the Brand vs Non-Brand Ratio check, matching on domain terms, headline content, and account name.

Note

Smart Bidding and rank-lost IS. Target CPA, Target ROAS, Maximize Conversions, and Maximize Conversion Value deliberately decline impressions the algorithm predicts will not convert. That declined volume shows up in your account as “lost IS to rank” even though the strategy is working as designed. AdGradr skips the rank-lost IS finding for Smart Bidding campaigns to avoid flagging intentional behavior. Budget-lost IS still applies — budget caps still matter regardless of bidding strategy.

Why this matters

Impression share tells you how much of your addressable market you are actually reaching. Losing IS to budget means your campaigns are running out of money before the day ends. You are missing qualified searches simply because the budget ran dry. Losing IS to rank means your ads are not competitive enough to show. These are two fundamentally different problems with different solutions.

What good looks like

• Non-brand Manual CPC campaigns: 60%+ search impression share, with losses split roughly evenly between budget and rank.
• Non-brand Smart Bidding campaigns: budget-lost IS under 20%; rank-lost IS is not a useful health metric (the algorithm is intentionally declining impressions).
• Brand campaigns: 80%+ search impression share. Your brand terms are the cheapest, highest-converting traffic you own. Losing brand IS means competitors are showing on your name.
• Budget-lost IS under 20% across the account.

Common mistakes

1. Treating all IS loss the same. Budget loss needs more spend. Rank loss (on Manual CPC) needs better Quality Scores, more relevant ads, or higher bids. Throwing money at a rank problem does not fix it.
2. Worrying about rank-lost IS on Smart Bidding campaigns. This is the algorithm doing its job. Optimize the conversion data feeding the algorithm instead.
3. Ignoring brand impression share. If your brand IS is below 80%, competitors are bidding on your name and capturing searches from people who already know you. That is the cheapest traffic to protect.
4. Chasing 100% IS on non-brand. Full impression share on competitive non-brand terms is expensive and rarely efficient. Focus on incremental profitability, not maximum coverage.
5. Not checking IS at the campaign level. Account-level IS averages can hide a campaign that is severely budget-constrained while another has plenty of headroom.

How to fix it

For budget-constrained campaigns (IS lost to budget):

1. Check if the campaign is profitable. If CPA or ROAS is within target, increase the daily budget in 20% increments.
2. If budget is fixed, reduce keyword scope. Pause lower-performing keywords or tighten match types to concentrate spend on what converts.
3. Review your ad schedule. If conversions cluster in certain hours, use ad scheduling to focus budget on peak times.

For rank-constrained Manual CPC campaigns (IS lost to rank):

1. Check Quality Scores. Keywords below QS 5 are dragging rank down. Improve ad relevance and landing page experience for those keywords.
2. Review ad copy relevance. Ensure headlines include the target keyword and match search intent.
3. If Quality Scores are already strong (7+), the issue is bid level. Increase bids or switch to a more aggressive bidding strategy.

For Smart Bidding campaigns showing high rank-lost IS:

The algorithm is declining impressions it predicts will not convert. The lever is conversion data quality, not bids:

1. Verify conversion tracking is firing accurately. Bad conversion signals teach the algorithm to decline the wrong impressions.
2. Make sure conversion values reflect actual business value (especially for tROAS).
3. Give the algorithm enough conversion volume to optimize against (Google recommends 30+ conversions in 30 days for Target CPA).
4. If you genuinely want more volume regardless of efficiency, switch to Maximize Conversions or raise the Target CPA / lower the Target ROAS.

For brand campaigns under 80% IS:

1. Ensure brand keywords are in their own campaign with dedicated budget.
2. Set bids high enough to maintain top position (Manual CPC is fine here — Smart Bidding tends to overpay for clicks that would convert anyway on brand).
3. If competitors are bidding on your brand, consider raising bids and filing a trademark complaint with Google if applicable.

When to ignore this check

• Niche B2B accounts with very small search volume may show volatile IS numbers. A 30% budget loss on 50 total impressions is not meaningful.
• Deliberately capped budgets during a testing phase. If you are intentionally limiting spend to validate performance, low IS is expected and acceptable.

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