What is a campaign password used for?

Campaign passwords are used to access tracking statistics for a given add tracking campaign.

For administrators when creating your add campaigns, only enter a password if you want to give a third-party access to the campaign statistics page. You can give out the direct campaign statistics URL and the visitor will get prompted to enter the password to view the statistics.

For users: To receive your password, you would need to contact the administrator who issued you the campaign tracking link.