Go to Business Settings.
On the left-hand side below Users, click “Partners”.
Click the Blue + Add dropdown.
Select "Give a partner access to your assets".
5. Enter the Humming Partner Business ID (3573159096049139) and click “Next”.
6. On this screen, you can add partners to multiple assets. In the left hand side, the the first column, start with Pages > New Pages Experience, and assign “Ads” permissions.
7. Next, go to “Ad accounts” and assign “Manage campaigns” permissions.
8. Finally, go to “Datasets” (This is what Facebook is now calling Pixels) and assign “Manage events dataset” permissions. The reason for “Manage” access is in case we need to add any new events to any pages or add any new custom conversions.
9. Click “Save changes” and you're done!