How firms compete with each other and how they attain and sustain competitive advantage is the essance of what type of management?

The essence of how firms compete and achieve sustainable competitive advantage falls under strategic management. This field focuses on the formulation and implementation of major goals and initiatives, taking into account resources and the external environment. By analyzing competitors, market trends, and internal capabilities, firms can develop strategies that differentiate them and create value. Ultimately, effective strategic management enables organizations to adapt and maintain their competitive edge over time.