Share of Voice
Share of Voice (SOV) is a metric that expresses how much of a market's search visibility and exposure a single brand captures across a defined set of keywords, stated as a percentage relative to competitors. Rather than measuring rank alone, it measures how large a brand's search presence is within its competitive environment.
- Share of Voice (SOV) converts the click and visibility share a brand captures across a tracked keyword set into a percentage relative to competitors.
- Because it factors in rank, search volume, and position-based estimated click-through rate (CTR) together, it reflects actual traffic capture more accurately than rank alone.
- Ahrefs recommends excluding both your own and competitors' branded keywords from SOV analysis, since non-branded SOV is the key signal for acquiring new customers.
- When SOV runs ahead of market share, the gap is called excess share of voice (eSOV) and is treated as a leading indicator of future growth.
- SOV is adjacent to but distinct from search visibility: visibility is the absolute volume of your content's exposure, while SOV is your relative share against competitors.
Overview
Share of Voice (SOV) is a metric that expresses, as a percentage relative to competitors, how much search visibility and exposure a single brand captures across a predefined set of keywords. The core question is not "where do we rank" but "what percentage of this market's search traffic do we capture." Because it positions you against competitors over the same keyword pool, it is better suited to understanding your standing within the overall competitive landscape than to tracking individual rank fluctuations.
According to Semrush, SEO Share of Voice is the estimated organic traffic your site receives from a set of tracked keywords divided by the total organic traffic those keywords generate. For example, if your tracked keywords produce 100,000 clicks per month and your site captures 6,000 of them, your Share of Voice is 6%.
How It Is Calculated
Share of Voice is not a simple average rank; it weights several factors. Semrush explains that it estimates traffic by considering keyword rankings, keyword search volume, SERP features, and the estimated click-through rate (CTR) for each position together. In other words, ranking high on high-volume keywords contributes more to your share.
Ahrefs computes it in Rank Tracker as follows: the total clicks your site receives across all tracked keywords, divided by all clicks generated on the SERPs for those same keywords. As a single-keyword example, capturing 1,500 of 5,000 clicks yields a 30% SOV for that keyword, and this calculation extends across the entire tracked keyword set.
| Metric | What It Measures | Competitive Comparison |
|---|---|---|
| Search visibility | The absolute size of your keyword exposure and rankings | None (can be measured for your site alone) |
| Share of Voice (SOV) | Your share of clicks and traffic relative to competitors | Required (based on the competitor total over the same keyword pool) |
As the table shows, search visibility can be measured on its own to gauge how much your content is exposed, but Share of Voice only becomes meaningful when compared against all competitors over the same keyword pool. Even when your visibility is high, your SOV can fall if competitors' visibility rises faster.
Applications
The greatest benefit of Share of Voice is competitive benchmarking. By tracking your site and competitors across the same keyword set, you can see at a glance who captures how much of the market's search traffic. Semrush's Position Tracking lets you monitor each domain's daily SOV trend as a time series.
Keyword separation also matters. Ahrefs recommends always excluding your own and competitors' branded keywords from SOV analysis, because branded keywords come from searchers who already know you and tend to inflate your share. Non-branded SOV, by contrast, signals acquisition of new customers who do not yet know you, and more accurately reflects your room to expand in the market.
When your SOV exceeds your actual market share, the condition is called excess share of voice (eSOV). Ahrefs defines this as visibility that outpaces market share, and it is generally interpreted as a leading signal of future growth.
Execution Checklist
- First define the core keyword set you share with competitors, then register your own and competitor domains in the same tracking project.
- Exclude branded keywords for both your brand and competitors from the tracking list to measure non-branded SOV separately.
- Use volume- and CTR-weighted SOV rather than raw rank as your reference metric, and monitor it as a time series.
- Because top positions on high-volume keywords contribute heavily to SOV, prioritize high-volume, mid-ranked keywords for improvement.
- Compare your SOV against your actual market share to check for excess share of voice (eSOV) and assess your growth potential.