Share of voice in SEO measures how much of the organic search attention in your market you capture, relative to competitors. Rankings tell you where you sit for one query at a time. Share of voice rolls a whole keyword set into one percentage, which is why it appeals to anyone who has to report on a market rather than a page.
It is also one of the easiest metrics to flatter. Change the keyword list and the percentage changes with it, often dramatically, with no change in how the site actually performs. Used well, it is the best single view of competitive position you can get. Used carelessly, it is a number you chose.
What is share of voice in SEO?
SE Ranking’s guide to measuring share of voice defines it as “a metric used to measure the strength of your brand’s voice compared to that of your competitors.” The idea began in paid advertising, where it described a brand’s portion of total ad spend or impressions in a category. It has since spread to social media, PR and SEO, with each channel measuring “voice” in its own unit.
In SEO, the unit is estimated organic traffic. A site that ranks first for a keyword takes far more of the available clicks than one ranking eighth, so share of voice in search is largely driven by ranking position. That makes it a weighted view of your rankings, not a separate signal.
The share of voice formula
SE Ranking’s SEO formula is straightforward. Take a fixed set of keywords, look at the sites ranking in the top N results for each (top 20 is typical), and compare estimated traffic.
SoV (%) = [your site’s traffic forecast for the keyword set in the top N ÷ all sites’ total traffic forecast for the same set in the top N] × 100
| Component | What it is | Where it goes wrong |
|---|---|---|
| Keyword set | The fixed list of queries that defines your market | Too narrow, too branded or changed between periods |
| Top N | How deep in the results you count (top 20 is typical) | Different depths produce different totals |
| Your traffic forecast | Estimated traffic your site earns across the set | Depends on the tool’s click model |
| All sites’ traffic forecast | Estimated traffic for every site ranking in the top N | Includes sites that are not real competitors |
A hypothetical example shows the mechanics. Suppose the sites ranking in the top 20 across your 50 tracked keywords earn an estimated 10,000 visits a month between them, and your site’s share of that is 1,500. Your share of voice is 15%. If a competitor moves from fifth to first on your largest keyword, their slice grows and yours shrinks, even if your own rankings never move. Those figures are illustrative, not taken from any real market.
How to measure share of voice in SEO, step by step
- Build the keyword set. Start from the queries your customers actually use, across the funnel. Exclude your brand name unless you also include competitors’ brand names.
- Fix it. Save the list and keep it unchanged between periods. Adding keywords later breaks every comparison you have made.
- Track positions consistently. Same location, same device, same search engine. Our guide on how to track keyword rankings covers the settings that matter.
- Apply a click model. Convert positions into estimated traffic. Most rank trackers do this for you; our post on CTR by position explains why the curve varies by query.
- Calculate and record monthly. One percentage per period, with your top competitors shown beside it.
Weekly figures are mostly noise, because daily ranking churn moves the percentage without meaning anything. A monthly trend, read against your competitors’ trends, is where the metric becomes useful.
Record the method alongside the figure: the keyword count, the depth you counted to, the location and the date the set was last changed. When someone asks in six months why the share jumped, that note is the difference between an answer and a guess. It also stops a well-meaning colleague from quietly adding keywords that happen to favour you.
Why the keyword set decides the answer
The common advice is that share of voice is an objective measure of market position. It is not. It is objective only within the keyword set, and the set is a choice. Pick the long-tail queries you already rank for and you dominate. Pick the head terms owned by large publishers and you vanish. Both numbers are correct, and neither is the truth about your market.
Three habits keep the number honest. First, build the set from customer demand, not from your own rankings. Second, include the terms where you are weak, because those are where the competitive story lives. Third, segment it: a commercial set and an informational set, reported separately, reveal far more than one blended figure.
Watch the “all sites” denominator too. Forums, marketplaces and encyclopaedia pages take large slices of many keyword sets. They push your share down without being competitors you could ever displace. Some teams report share among named competitors only, which is fine as long as the report says so.
Share of voice metrics across channels
Because the idea came from advertising, the name now covers several different measurements. Paid search share is based on ad impressions. Social share is usually based on mentions or engagement. PR share is based on coverage. SEO share, as above, is based on estimated organic traffic. They are not interchangeable, and adding them together produces a number with no defined unit.
Within SEO, share of voice works best as a headline beside a few supporting figures, not in place of them. Our list of SEO KPIs worth tracking covers which metrics belong next to it: clicks, conversions and positions for the terms that drive revenue.
The limitation is built in. Share of voice in SEO is estimated traffic divided by estimated traffic, so it inherits every error in the click model, and it says nothing about whether those visits convert. A rising share on informational terms can sit beside flat revenue. Treat it as a measure of visibility against competitors, keep the keyword set fixed, and state how it was built every time you report it. More measurement guides sit in our data archive.
Frequently asked questions
What is share of voice in SEO?
Your site’s share of the estimated organic traffic available across a fixed keyword set, compared with every site ranking in the top results for those keywords.
How do you calculate SEO share of voice?
Divide your site’s traffic forecast for the keyword set in the top N results by the total traffic forecast for all sites in the same top N, then multiply by 100. Top 20 is a common depth.
What is a good share of voice?
There is no universal benchmark, because the figure depends entirely on the keyword set. Compare against your own history and your direct competitors on the same set.
Should branded keywords be included?
Only if competitors’ brand terms are included too. Your own brand name alone inflates your share without saying anything about the contested market.
The takeaway Share of voice in SEO is easy to calculate and easy to flatter. Fix an honest keyword set built from demand, report it monthly against named competitors and say how it was built.
