Definition
Share of Voice (SOV) in SEO measures a site's share of organic visibility relative to all competitors on a defined keyword panel. It is calculated by weighting ranking positions by each keyword's search volume. A 25% SOV means your site captures a quarter of total available visibility on tracked queries. SOV is one of the best strategic indicators because it measures relative competitiveness rather than absolute numbers. Tools like Semrush, Ahrefs, and Sistrix offer automated SOV calculations. In marketing, SOV is often correlated with market share (Binet and Field's law), making SEO SOV a business growth predictor.
Key Points
- Measures relative visibility share vs competitors, not an absolute figure
- Correlated with market share per marketing studies (SOV = SOM law)
- Calculable via Semrush, Ahrefs, Sistrix, or manually on a keyword panel
Practical Examples
Competitive benchmark
On 500 'link building' sector keywords, LemmiLink has an 18% SOV, the leader has 32%. Analysis identifies query clusters where SOV is weakest to direct content and link building efforts.
Progress tracking
In 6 months of SEO campaign, SOV goes from 8% to 15%, while the main competitor drops from 35% to 30%, indicating significant catch-up.
Frequently Asked Questions
Define a panel of strategic keywords, collect each competitor's positions, and weight by search volume. Tools like Semrush and Ahrefs automate this. Simplified formula: SOV = (your site's estimated clicks) / (all sites' estimated clicks) x 100.
Generally, aim for a SOV higher than your current market share to stimulate growth. A 20-30% SOV is excellent in a competitive market. The goal is to progress regularly vs closest competitors.
Go Further with LemmiLink
Discover how LemmiLink can help you put these SEO concepts into practice.
Last updated: 2026-02-07