This video covers the penalty parameter approach, a method used in optimization to handle constrained problems by transforming them into unconstrained ones. The penalty parameter approach introduces a penalty term into the objective function, which imposes a cost for violating constraints. The severity of the penalty increases as the solution deviates from the feasible region, guiding the optimization process toward satisfying the constraints while still improving the objective function. The video explains how to select appropriate penalty parameters and demonstrates how this method can be applied to solve various constrained optimization problems effectively. Through step-by-step examples, viewers will learn how the penalty parameter approach works and how it simplifies the process of finding feasible, optimal solutions.