Strategic management entails decisions and actions that determine a corporation's long-term performance through environmental scanning, strategy formulation, implementation, and evaluation. It evolves through four phases: basic financial planning, forecast-based planning, externally oriented planning, and strategic management, emphasizing a transition from simplistic operational planning to an integrated, strategic approach across the organization. The benefits of strategic management include enhanced long-term performance, a clearer strategic vision, and improved responsiveness to change, underscoring its importance for organizational success.