In this learning track, we will learn about the DGTD method and its typical applications. We will begin by discussing the basic physics behind the DGTD solver and compare it to the FDTD solver. Then we will demonstrate a typical workflow for setting up an optical simulation using the DGTD solver to obtain the absorption and scattering cross-section of a gold nanoparticle due to Mie scattering. Finally, we will learn common simulation tips for Ansys Lumerical DGTD solver.