The document discusses three key questions for effective brand positioning: 1) Have we established an appropriate frame of reference for the brand? 2) Are we leveraging the brand's points of parity with competitors? 3) Are the brand's points of difference compelling and desirable to customers? It emphasizes the importance of considering the brand's frame, points of parity, and points of difference, and how a brand's positioning may need to evolve over time to stay relevant to customers' changing needs. An example of Subway adjusting its positioning from a health focus to also emphasize taste is provided.