All new creative packs undergo a human moderation process when their associated campaigns go live for the first time. Creatives can be rejected due to content or technical checks.
If the creative was rejected due to its content, please read our policies and adjust the creative accordingly. You can then upload the new version through the self-serve dashboard.
If the creative (usually playable assets) was rejected due to a technical problem, please test the creative with the test app.
To understand more about our moderation processes, please visit our documentation page.