This allows a website to track visitor behavior on the sites on which the cookie is installed and to link a visitor to the recipient of an email marketing campaign, to measure campaign effectiveness. Tracking is performed anonymously until a user identifies himself by submitting a form. https://documents.marketo.com/legal/cookies/ Outbrain Outbrain offers a content marketing service that aims to present users to content that they are interested in, based on their behaviour and preference.