The document discusses the Golden Section Method, which is a technique for finding the extremum (maximum or minimum) of a unimodal function. It works by successively narrowing the range of possible values using the golden ratio. The key steps are: (1) initializing the interval of uncertainty, (2) evaluating the function at two points defined by the golden ratio within that interval, and (3) narrowing the interval based on which point has a better function value. An example applying this method to minimize a quadratic function is provided and the method is shown to effectively locate the optimum value through multiple iterations.