This document describes a search to display advertising service that targets online display advertising based on users' demonstrated search intent. The service leverages keywords from a client's search campaign and matches users' cookies to those who have searched for related terms. It then serves display ads to the identified audience who have shown purchase intent. The process is easy for clients who just need to provide keywords or intent categories, and the service reports standard campaign metrics and audience analytics for improved ROI and on-site conversions.