1) Add “Sharethrough” as an allowed source for your account
First, make sure you are looking at the account level view.
Then click “Settings” button on the right.
Locate “Media sources” section. If Sharethrough is already on the right side, you don’t need to do anything here.
Otherwise find “Sharethrough” in media sources on the left and click “Move to allowed” below. Do not forget to click “Save”.
2) Add Sharethrough as a source to a specific ad group
Go to the ad group and then go to “Media Sources” tab. Then click on “+ Media Sources” orange button. Click on “Sharethrough”. Sharethrough will now be added to a list of active media sources for this ad group.
3) Enable the Sharethrough source in a specific ad group