Syncing audiences to ad platforms
Syncing sends your audience to an ad platform as a custom audience, named after your ContactLevel audience. You can then pick it for targeting in that platform's ad manager. Syncing and re-syncing never cost credits.
Every platform syncs directly from ContactLevel. You don't need to export a CSV for any of them, including Reddit and X.
Before you start
Connect the ad platform under Integrations → Connections. See Connecting your ad accounts.
Add contacts to the audience. See Ways to add contacts to an audience.
Sync an audience
Go to Audiences and open the audience.
Click Syncs in the top right.
On the Destinations tab, click Run next to the platform you want.
To send the audience to every connected platform at once, click Run All Syncs at the bottom instead.
Platforms you haven't connected show Not Connected and a Connect button instead of Run.
Read the Destinations tab
Each platform has a status:
Not Synced: connected, but this audience hasn't been sent yet.
Synced: the audience has been sent to the platform.
Not Connected: connect the ad account first.
Est. match rate shows how many people the platform matched, for example "0% · 0 estimated matches", or "Not available" before the first sync. Match estimates update after the ad platform processes your audience, so a fresh sync often shows 0% for a while.
A small audience can stay at 0% until it passes the platform's minimum. LinkedIn, for example, needs at least 300 matched members before an audience serves. See Recommended audience sizes by platform.
The Audiences page shows the same thing for all your audiences, with one column per platform: Off (not set to sync), Not synced, Synced or Failed.
Check the run history
Switch to the Run history tab to see each sync run: destination, status, records sent, and when it started and finished. Filter by platform with the All platforms dropdown. Statuses refresh on their own.
The Records number is often higher than the number of contacts in your audience. That's expected. ContactLevel sends one row per identifier it has for a person (emails, phones, device IDs), which gives the platform more chances to match them.
Adding contacts to an audience that's already running
Add the new contacts to the audience.
Open Syncs and click Run (or Run All Syncs) again.
The custom audience in the ad platform updates in place, so campaigns already targeting it pick up the new people without any change to your targeting. You pay credits only for the new contacts you add, not for the sync.