What share of voice is
Share of voice started as a media-planning idea: your spend, or your presence, as a percentage of the total in a market. On television it was your ads as a share of all the ads in a slot. In digital out-of-home the same idea gets sharper, because the screen itself is shared. A single screen does not run one brand around the clock; it rotates a loop of ads, and each brand takes a slice of that loop.
So share of voice in DOOH is the portion of a screen's or network's rotation your brand holds over a period. If your ad appears often on the loop, your share is high and there is little room left for rivals. If it appears rarely, your share is low and someone else owns the moment. This page covers what share of voice is, how it works on a shared loop of plays, and how buying per play gives you direct control of the number.
How it works on a shared loop
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A digital screen plays a loop: a fixed cycle of ads that repeats, so a ten-second spot might come around once every couple of minutes alongside other brands. Your share of voice is your plays divided by the total plays over the same window. If a loop shows ten ads in a cycle and three of them are yours, your share of voice on that screen is about 30%. Book more of the loop and the share rises; book less and it falls.
The reason this matters is repetition. Out-of-home works by being seen again and again in the places people move through, so a brand that holds a larger share of the loop simply lands more often on the same audience. The trick is that you rarely want a high share everywhere. You want it where and when it counts: heavy on the screens near your stores, or in the commute hours, and light or absent elsewhere. That is where the unit underneath, the individual play, becomes the lever, as covered in what is a play.
Per-play control of your share
Because Blindspot bills per play, one ad appearance on one screen, you set your share of voice directly by how many plays you buy. Turn a screen's plays-per-hour up and your slice of that loop grows; turn it down and it shrinks. Do it screen by screen and hour by hour, the way dayparting works, and you can hold a heavy share on the screens outside your stores during the evening and a light share on a distant highway board at noon, all in one campaign. Every play is logged, so your share is a counted fact, not a forecast.
This is also what keeps a share-of-voice strategy efficient at any budget. Instead of paying a flat network rate to raise your presence everywhere, you spend on the exact plays that build the share you want, in the places that matter, and nothing on the rest. A first campaign can own the loop on a handful of neighbourhood screens; a global brand can hold a measured share across thousands, the way a worldwide flight delivered 2,146,892 plays across 4,067 screens in the Visit Maharashtra case study. There is no minimum spend and no media buyer in the middle: you see the per-play price, set the plays, and publish, live in about 48 hours. Compare how platforms handle this in the DOOH platforms guide, or open the booking flow and set your share.
Your share is the plays you hold on the loop.
Share of voice, in one line