You're spending $15,000 per month on marketing. Is it working? Most SaaS founders can't answer confidently. They know some metrics: Website traffic is up 20% this quarter Email list grew by 500 subscribers Demo requests are coming in But they don't know: Which channels actually drive revenue (not just leads) Where marketing budget is being wasted What to fix first to get the biggest impact The cost of not knowing: Wasting thousands on channels that don't convert Missing obvio