This lesson covers the process of creating a domain for a boundary value problem and discretizing it for approximate solutions using Ansys software. The lesson explains how to start the measure, generate an initial mesh, and improve it for better solution results. The lesson also discusses how to create a finer mesh with smaller elements using the sizing option and how to improve the mesh by constraining the number of divisions. The lesson further delves into the concept of adding bias to achieve higher resolution near the cylinder than near the outer walls. Finally, it explains how to view information about the mesh.