Funnel chart 
Funnel chart is perfect for analyzing conversions and process efficiency in sales, marketing, recruitment, or any staged process with drop-offs. 🚀
This chart is suitable for: 
- Displaying Process Stages – Shows how objects or people go through certain stages, such as sales or business processes.
- Loss Analysis at Each Stage – Helps identify where the largest losses occur in customers, leads, or resources.
- Conversion Visualization – Helps assess the effectiveness of marketing or business processes.
Typical Use Cases: 
- Sales Funnel Analysis (how many people reached the purchase stage).
- Measuring Marketing Campaign Effectiveness (from ad views to purchases).
- Staff Recruitment Process (how many candidates submitted resumes, attended interviews, and were hired).
yml Configuration example
yml
type: funnel
title: Funnel
data:
  table: demo.cleaned_sales_data
  query: 1=1
  metrics:
    - name: sales
      operator: sum
      title: sales
  x: order_date
  granularity: quarter
  groupby: product_line