Brand Share of Voice (Brand SOV) measures how visible your brand is across search results and AI responses compared to competitors. It combines traditional SEO visibility (how many keywords you rank for) with GEO visibility (how often AI cites your brand).
Brand SOV is calculated as the percentage of total visibility opportunities where your brand appears. For example, if you track 200 keywords and AI prompts, and your brand is visible in 60, your SOV is 30%.
Brand SOV shows whether your market presence is growing or shrinking relative to competitors. Les Binet and Peter Field's research shows that brands with SOV exceeding their market share tend to grow: the "excess SOV" principle. This applies to AI search as well: increasing your Citation SOV alongside traditional SEO presence drives compounding growth.
SOV Growth Framework:
| SOV vs Market Share | Strategic Implication | Action |
|---|---|---|
| SOV > Market Share | Growth mode: gaining visibility | Maintain momentum, expand keywords |
| SOV = Market Share | Steady state: holding position | Defend and optimize |
| SOV < Market Share | Decline risk: losing ground | Increase investment urgently |
How Brand SOV is Calculated
| Component | What it Measures | Data Source |
|---|---|---|
| SEO SOV | Keywords ranking in top 10 ÷ total tracked | SERP tracking |
| AIO SOV | AI Overview citations ÷ total AIO appearances | AIO monitoring |
| GEO SOV | AI answer citations ÷ total tracked prompts | GEO prompt tracking |
| Combined Brand SOV | Weighted average of above | Halox dashboard |
Brand SOV vs Citation SOV
| Metric | Brand SOV | Citation SOV |
|---|---|---|
| Scope | SEO + GEO combined | GEO (AI answers) only |
| Measures | Overall brand visibility | AI citation share |
| Use case | Strategic market positioning | GEO performance tracking |
| Audience | C-suite / board reporting | Marketing / GEO team |
| Update frequency | Weekly / monthly | Daily / weekly |
Use Brand SOV for board-level reporting. Use Citation SOV for tactical GEO decisions.
How Halox Helps
Halox tracks Brand SOV across SEO and GEO dimensions:
- Keyword Dashboard: Monitors how many tracked keywords rank in the top 10, forming the SEO component of Brand SOV
- AI Visibility Dashboard: Tracks citation rate and AVI across AI platforms, forming the GEO component
- Strategy Map: Visualizes keyword clusters by competitive position, showing where your SOV is strong vs. weak
Frequently Asked Questions
Your Brand SOV should exceed your market share. If you hold 15% market share, aim for 20%+ SOV to drive growth. The "excess SOV" principle from Binet & Field's research shows that brands consistently outperforming their market share in SOV tend to grow. Track monthly against competitors and set quarterly SOV growth targets.
In Halox, yes. Brand SOV combines traditional SEO visibility with GEO visibility (AI citations and mentions) for a holistic view across both channels. This makes it the single metric that bridges SEO and GEO performance.
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