The document discusses the power of 2D stacked charts, also known as Marimekko or Mekko charts, for business communication and data visualization. It provides three examples of 2D stacked charts showing: (1) sales by channel and company, (2) product mix across retail outlets, and (3) market share of a financial product across states in Australia. The charts were created using an Excel macro that can build 2D stacked charts in both Windows and Mac versions of Excel.