Find the delivery constraint before buying more visibility

Define the eligible opportunity

Start with the campaign’s intended market, locations, schedule and offer. Check whether the advertised service is available and whether the business can handle additional demand. A campaign narrowly targeted to a profitable niche may have a very different opportunity set from a broad discovery campaign.

Google Ads defines impression share against estimated eligible impressions and distinguishes losses associated with budget and Ad Rank. This denominator depends on the campaign context. It is not a share of all searches in the market, and changing eligibility can change the measure.

Separate the main delivery explanations

Inspect the applicable loss metrics alongside approval status, actual spend and recent setting changes. Budget loss suggests one kind of constraint; rank loss calls for a broader review of competitiveness and ad relevance. Avoid reducing every rank issue to a bid increase.

Check comparable periods and the correct reporting level. Some loss measures are unavailable in certain views or conditions. A missing value is not zero. Preserve those limitations in the diagnostic note rather than filling them with an assumption that makes the table easier to read.

Ask whether the additional opportunity is desirable

Review the quality and commercial value of existing traffic before expanding exposure. If current enquiries are unsuitable or service capacity is strained, reaching more similar auctions may deepen the problem. If outcomes are strong, consider what evidence is needed about the next increment of spend.

Do not multiply missed impression share by current sales and call the result lost revenue. The missed auctions may differ in competition, intent and cost. Build a bounded scenario with explicit assumptions or use an appropriate test before presenting a confident growth estimate.

Recommend one controlled next step

Choose a step tied to the diagnosis: resolve eligibility problems, improve relevance, investigate a rank constraint or evaluate a limited budget change. State the budget ceiling, expected learning and review point. Changes to live spending require the owner’s authorization.

Track actual delivery and mature outcomes after the change, with other changes recorded. A higher impression share can be a useful delivery result without being a business success. Keep the original objective visible so the team does not optimize for a percentage detached from customer value.

Make the reasoning concrete.

A hypothetical repair service has strong demand during staffed hours but cannot answer calls overnight. A low impression-share figure prompts a request to expand budget and schedule. The current metric does not show that unstaffed exposure would be useful.

Investigate the relevant delivery constraint within serviceable hours and require outcome evidence before promising that higher coverage will pay back.

Take the questions into your next brief.

Use these prompts in your own notes. Nothing is submitted from this page.

1. Opportunity

   Which auctions are relevant and serviceable?

2. Constraint

   What do budget, rank and eligibility evidence show?

3. Value

   Is current traffic commercially useful?

4. Expansion

   What changes at the margin?

5. Control

   What authorized limit and review govern the next step?

Watch for the wrong conclusion.

• Treating impression share as total market share.
• Assuming every missed impression has current average value.
• Interpreting missing metrics as zero.
• Expanding beyond operational capacity.

Sources & scope

Frameworks, worksheets and hypothetical examples are original editorial synthesis. Linked primary sources support only the stated concepts. Source checking is not an independent audit of effectiveness. No named human author or reviewer is claimed.

• Google Ads Help: Get impression share data →Primary platform documentation · Supports: Defines eligible impression share and budget/rank loss measures. These diagnose delivery constraints, not the profitability of additional impressions.