Create a TikTok Ads campaign with broad (auto) targeting enabled

Steps

1. Authenticate with an access token that has Campaign Management permissions; ensure your ad account has TikTok's automated targeting features enabled.
2. Create a campaign via POST /open_api/v1.3/campaign/create/ with an appropriate objective_type (e.g., CONVERSIONS, APP_INSTALL); set the campaign-level budget and budget_mode.
3. Create an ad group under the campaign; to enable broad/auto targeting, set audience_type to REACH_AND_FREQUENCY or leave targeting fields empty to let TikTok's system determine the best audience automatically.
4. Alternatively, set targeting_expansion.enable to true in the ad group payload; this allows TikTok to expand beyond your explicit targeting criteria when it finds better-performing audiences.
5. Supply at least one creative (ad) in the ad group with a video asset, ad text, and landing page URL; TikTok's broad targeting requires the system to have creative data to determine relevance signals.
6. Monitor the ad group's audience reach and CPM via the reporting API; compare performance against a parallel ad group with manual targeting to evaluate whether auto-targeting improves CPA.