A Keyword Plan consists of the recommendations from the Keyword Planner in TikTok Ads Manager. Follow the steps to learn how to add a Keyword Plan to an Ad Group in TikTok Ads Manager.
Ensure you can access the Keyword Planner tool in TikTok Ads Manager.

To add your keyword plan to an ad group:
Navigate to Keywords section at the Ad Group level
Click Upload --> From Keyword Plan
Choose Desired Plan
Click Upload to complete the process