A lookalike audience finds new people who resemble your best customers. It is a marketplace plugin: Lookalike Audiences, a one-time $1,990.
How it works
- Built from converters or customer lists — your seed.
- Size you choose — smaller is closer to the seed, larger reaches more people.
- Refreshed daily, so the audience follows your newest customers.
- Ready on every channel.
Picking a good seed
The lookalike can only be as good as the people it copies.
- Use converters, not clickers, when you have enough of them.
- Prefer one product or offer per seed rather than everyone who ever bought anything.
- Keep the seed fresh — the daily refresh helps, but a seed built on last year's offer copies last year's buyers.
Choosing the size
- Start small to test whether the lookalike performs close to your retargeting.
- Widen once the cost per result is acceptable and you need more volume.
Combine with exclusions
Exclude your existing customers so the lookalike spends only on new people. See Audiences: retargeting and suppression.
Data note
Seed lists contain data about real people. Make sure you have a lawful basis to use them for advertising — this is not legal advice.
Related: Importing audiences from a DMP or CSV · Connecting a CDP
Nov 13, 2026