AEO Metrics Glossary: Understanding Citation Frequency, Share of Voice, and AI Visibility Score
The traditional SEO dashboard is dead. This guide defines the new KPIs of 2026—Citation Frequency, Sentiment Score, and Cost Per Exposure—enabling marketing leaders to measure what actually matters in the Answer Economy.
Executive Summary #
The most dangerous phrase in business is "You can't manage what you can't measure." For two decades, digital marketing was managed via a standardized dashboard: Rankings, Click-Through Rate (CTR), and Bounce Rate.
In 2026, those metrics are failing. With 60% of searches ending without a click and 25% of traffic migrating to AI assistants, the traditional SEO dashboard is blind to the majority of customer interactions. If a user asks ChatGPT for a recommendation and buys your product without ever visiting your blog, traditional analytics records this as "Direct Traffic" or "Dark Social."
This guide establishes the Standard AEO Measurement Framework. We define the new KPIs—from Citation Frequency to Cost Per Exposure—and provide the formulas and benchmarks necessary to audit your performance in the Age of Answer Engines.
Part 1: The Visibility Metrics (Top of Funnel) #
Objective: Measure presence in the "Answer Box."
In AEO, we do not measure "Rank" (Position 1-10). We measure "Inclusion." You are either in the answer, or you are not.
1. Citation Frequency (CF) #
Definition: The percentage of times your brand entity is mentioned in response to a specific set of prompts.
Formula: (Total Mentions / Total Prompts) × 100.
Benchmark: A CF of >15% indicates market leadership.
2. Share of Voice (SOV) #
Definition: Your brand's visibility relative to competitors within the same answer.
Context: If ChatGPT lists 5 tools, and you are #1, your SOV is higher than if you are #5.
AEO Nuance: SOV also accounts for "Exclusivity." Being the only recommendation is the ultimate goal.
3. AI Visibility Score #
Definition: An aggregate score (0-100) used by platforms like Depthera and AEO Vision. It combines Citation Frequency, Rank Position within the answer, and Engine Diversity (presence across GPT, Claude, Perplexity).
Part 2: The Trust Metrics (Middle of Funnel) #
Objective: Measure the quality of the mention.
Being mentioned is useless if the AI describes you as "expensive and buggy."
4. Sentiment Score #
Definition: NLP analysis of the adjectives used by the AI when describing your brand.
Scale: -1.0 (Negative) to +1.0 (Positive).
Critical Action: If your Sentiment Score drops below 0.5, you have a reputation problem in the training data (likely negative reviews on Reddit/G2).
5. Consensus Score #
Definition: A measure of how many independent sources are corroborating your brand's data.
Why it matters: A high Consensus Score protects you from "Hallucinations." If 100 sources agree on your pricing, the AI is unlikely to make up a random number.
Part 3: The Economic Metrics (Bottom of Funnel) #
Objective: Measure Revenue and Efficiency.
6. Cost Per Exposure (CPE) #
Definition: The cost incurred to generate one verified view of your brand in an AI answer.
Formula: Total Spend / Total Verified AI Impressions.
Benchmark: $18.00 per 1,000 exposures (CPM) is the efficiency target for Depthera campaigns.
7. Zero-Click Attribution Value #
Definition: The estimated revenue value of brand impressions that do not result in a click.
Proxy: Modeled based on "Direct Traffic" lift correlating with AEO campaign spikes.
Comparison: SEO vs. AEO Dashboard #
| Metric | Legacy SEO Standard | AEO / GEO Standard |
|---|---|---|
| Primary Goal | Rank #1-3 | Primary Citation |
| Click-Through Rate | 2-5% (Generic) | N/A (Zero-Click Focus) |
| Conversion Rate | 1.19% | 3.76% |
| Content Cost | $150/article | $12.60/article |
| Attribution | Last Click | Multi-Source Consensus |
| Cost Model | fixed Retainer | Performance ($18/1k) |
Conclusion: The Dashboard Shift #
If your monthly report still leads with "Organic Sessions," you are reporting on the past.
In 2026, the brands that win are not the ones with the most traffic; they are the ones with the most Influence. The transition to AEO requires a transition in analytics. You must move from measuring visits to measuring verifications.
Strategic Implication:
Start tracking Citation Frequency and Cost Per Exposure today. These are the leading indicators of future market share. If your Citation Frequency is dropping, your market share will follow—regardless of your website traffic.
Next Steps #
- Configure GA4: Read How to Track AI Visibility ROI to set up your AI referral channels.
- Audit Your Score: Use the Depthera dashboard to check your current AI Visibility Score.
- Start the Roadmap: Apply these metrics to your 30-Day Onboarding Plan.