What metrics and KPIs are both Marketing and Sales tracking for lead performance?

Marketing should be focused on campaign performance by checking qualification rates of leads by campaign, cost of acquisition per lead, average revenue brought in from qualified leads, and growth of leads by source. There should be a focus on driving more leads with high ROI while maintaining qualification rates. Sales should be focused on speed to lead and improving sequence performance to drive higher qualification rates. Marketing and sales should report and talk about these metrics openly to see what campaigns are worth investing further or which should be deprecated.