This endpoint is used to decline sending any user targeting information to bidder.
To make an opt out decision user should be redirected to page http://prebid.site.com/static/optout.html.
Then check or uncheck "Opt out?" field, pass Google Recaptcha verification and press "Submit" button.
This will make the request like:
GET http://prebid.site.com/optout?g-recaptcha-response=<VERIFICATION_CODE>&optout=On
and user will be redirected to the url defined in configuration
with host-cookie.opt-out-url and host-cookie.opt-in-url options dependent on its decision.
The response can be 401 Unauthorized in case of any errors occurs.
This operation is safe and can be performed many times up to user activity.