Using your audiences in Pinterest Ads
Sync a ContactLevel audience to Pinterest and it appears in Pinterest Ads as a custom audience named after your ContactLevel audience. You then select it in your campaign's audience targeting.
Connect Pinterest
Go to Integrations → Connections.
Open Pinterest Audiences (row menu → View details).
Click the connect button, log into Pinterest and approve access.
Select the ad account ContactLevel should sync audiences to.
You can also start from an audience: in the Syncs window, Pinterest shows Not Connected with a Connect button until you've set it up.
Sync your audience
Open your audience and click Syncs.
Click Run next to Pinterest Ads.
The status changes to Synced. The Est. match rate fills in after Pinterest processes the audience.
Use the audience in a campaign
In Pinterest Ads, open your ad group's audience targeting and add the custom audience with the same name as your ContactLevel audience. Check Pinterest's own minimum size for custom audiences before you expect it to serve.
When you add contacts in ContactLevel, open Syncs and click Run again to update the Pinterest audience.
Track visits
Add your audience's cl_audience parameter to the Pin's destination URL to see which audience members visit your site. See Finding your audience's UTM parameter.