The River Test is a method used in software development to evaluate the quality of code. It focuses on the readability and maintainability of code by assessing how easily a developer can understand it after a short period of time. The test emphasizes clear naming conventions, straightforward logic, and minimal complexity, which helps ensure that the code can be easily modified or extended in the future. This concept is often associated with the principles of clean code and software craftsmanship. By applying the River Test, developers can create software that is not only functional but also easier for others to work with, ultimately leading to better collaboration and fewer errors in the long run.