This webinar discussed how to attribute marketing activities across online and offline channels to understand their impact. It explained some common mistakes in online measurement like not accounting for costs. Case studies from Virgin Holidays and Waitrose were presented that linked online and offline sales. Virgin Holidays discussed how they used an attribution model to connect digital activities like pay-per-click to offline bookings via email addresses. This allowed them to shift 6% of offline revenue to attributed digital channels and increase email marketing returns. Proper project management was advised to integrate data from different systems and channels over time.