The SPACE matrix is a tool that evaluates a company's strategic position based on four factors: internal financial strength and competitive advantage, and external environmental stability and industry strength. Each factor is scored on a numeric scale, and the average scores are plotted on a graph to place the company in one of four quadrants, suggesting different strategies: conservative, aggressive, defensive, or competitive. The document provides details on how each of the four factors is evaluated based on financial, market share, industry, and environmental variables.