In order for an external partner run to ads from your profile on TikTok, they must be supplied with a TikTok Spark Code. 

This code allows them to run ads with the active post. This is simple to find within the mobile app: 

1. Open the TikTok app and go to your profile.
2. Find the specific video you want to authorise.
3. Tap the three dots (...) in the bottom right-hand corner of the video to open the menu.
4. Scroll through the menu and select Ad settings.
5. Toggle on the Ad authorisation option.
6. Read and accept TikTok's advertising terms when prompted.
7. Tap Generate code to create the unique Spark Ad code.
8. Copy the generated code by tapping the Copy Code button.
9. Share the code with whoever is setting up the ads for you.