This document discusses the importance of cross-channel attribution modeling for digital marketing efforts. It explains that there is currently a gap between attributing online versus offline conversions. Attribution modeling can help identify which digital marketing campaigns such as paid, organic, email are driving phone calls and offline revenue. This allows optimizing campaigns and measuring true ROI. The presentation provides insights from attribution modeling case studies including identifying top performing campaigns and channels. It recommends capturing phone call data to pass to sales to further nurture leads.