Strategic group mapping is a technique for determining

the different market positions that rival firms occupy in an industry and which companies are close competitors and which are distant competitors.

what strategic moves key rivals are likely to make next.

industry key success factors.

whether the collective impact of the five competitive forces is strong, moderate, or weak and which companies are best shielded from the most powerful competitive forces.

how many rivals are profitable, who the industry leader is$,$ and how big a competitive advantage the industry leader has.