Demandbase, the leader in B2B advertising and personalization, today introduced the B2B Marketing Cloud, the first-ever subscription-based marketing platform that enables businesses to precisely target accounts across the web, plan marketing and ad spending, visualize performance, and tie acquisition costs for target accounts to revenue. At the center of the B2B Marketing Cloud is Performance Manager, also launched today, an interactive dashboard that brings ad impressions, web site activity and CRM data into one unified view.