Glossary
Share of voice: how much of the market sees you
Share of voice measures the slice of available impressions you won. How to read Google's impression share and what the practical equivalent is in Meta Ads.
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Share of voice is the slice of available impressions that went to you instead of a competitor. It answers a question no other metric answers: is there market left, or are you already taking nearly all of it?
Where it actually appears
In Google Ads, under the name impression share.
Impression share = impressions received ÷ eligible impressions.
The report also splits what you lost and why:
- Lost to budget. There were searches, you were eligible, and the money ran out.
- Lost to rank. The budget was there, but the ad was not placed well enough. Bid, relevance and quality score live here.
That split is the metric's real value. It tells you whether the problem is money or quality, and those two fixes have nothing in common.
How to read the number
| Scenario | Reading |
|---|---|
| High share, stable cost | You own the term; growth needs another channel |
| Low share, lost to budget | There is unserved demand on the table |
| Low share, lost to rank | The problem is ad and page, not budget |
| High share on a broad expensive term | Likely waste; review match types |
Worth saying what few people say: one hundred percent impression share is not a target. The last few percentage points buy the least qualified searches of a term at the highest bid. On brand terms that makes sense; on broad terms, rarely.
The Meta Ads equivalent
Meta does not report share of voice, because there is no keyword auction with a visible, closed set of competitors. What exists is the combination of reach and frequency inside the audience you defined.
The practical reading: if frequency rises and reach does not grow, you are already touching nearly the whole available audience. More budget starts buying repetition instead of new people, and cost per result climbs alongside creative fatigue.
When it changes the decision
Share of voice is the metric that tells you when to stop optimizing and start expanding. While there is share lost to budget on terms that convert, adding money in the same place is the cheapest move available. Once share nears its ceiling, more money there returns less and less, and the conversation shifts to another channel or another audience.
The tracking routine that covers both platforms without becoming two routines is on the paid media reporting page.
Frequently asked questions
What is share of voice in advertising?
The slice of possible impressions that went to you. In Google Ads it appears as impression share: how many times your ad showed divided by how many times it was eligible to show.
What share of voice is good?
It depends on the goal. On brand terms, close to one hundred percent usually pays off because the click is cheap. On broad, expensive terms, chasing one hundred percent buys worse traffic, not more good traffic.
Does Meta Ads have share of voice?
Not by that name. The practical equivalent is reach within your defined audience combined with frequency: together they tell you how much of the available audience you are touching and how often.