The document discusses banning the concept of internal customers within an organization. It argues that viewing other departments as customers leads teams to focus on internal politics rather than the actual external customer. It advocates creating a joint digital team with a single budget focused on customer and company benefit. This streamlines prioritization and allows staff to innovate freely to meet customer needs. The key takeaways are to remove internal customers, focus on the real external customer, prioritize based on customer and company value, and empower teams to innovate.