This lesson covers the process of discretizing a boundary value problem domain in Ansys. It explains how to create an initial mesh, adjust the size of the elements, and apply changes to create a finer discretization. The lesson also highlights the importance of reducing the discretization error for improved solution results. For instance, it demonstrates how to change the units to the US customary option with inches and how to resolve skewed elements near the base of the geometry. Lastly, it emphasizes the importance of saving the project after completing these steps.