CUSTOM_AUDIENCE_TOO_SMALL Custom Audience Too Small

The custom audience you created or uploaded has fewer than the minimum 1,000 matched users required by TikTok. Audiences below this threshold cannot be used for targeting.

What causes this error?

The custom audience you created or uploaded has fewer than the minimum 1,000 matched users required by TikTok. Audiences below this threshold cannot be used for targeting.

How to fix it

1. Upload more data: Add more email addresses, phone numbers, or device IDs to your audience list.
2. Wait for matching: TikTok’s matching process can take up to 48 hours. The matched count may increase.
3. Use broader sources: Consider using website visitors or app activity instead of manually uploaded lists.