This document discusses metrics that are important for B2B marketers to measure. It notes that many B2B marketers struggle to measure marketing's impact on business outcomes and instead focus on easier metrics like outputs and activities. The document recommends that marketers measure metrics that connect marketing to revenue, profit, and customer growth. It also suggests managing marketing performance across the entire customer lifecycle rather than just focusing on the early funnel. Marketers need to show how their activities drive sustainable business development in order to gain credibility and secure budgets.