This lecture covers the concept of product fields generated by charges, the density of magnetic and electric dipoles, the link between micro- and macroscopic equations, and the properties of materials in electromagnetism. It also explains the behavior of charges in conductors and insulators, the concept of electric and magnetic dipoles, and the sources of electric and magnetic fields. Additionally, it discusses the definitions and properties of electric and magnetic dipole moments, as well as the Maxwell equations in integral form and the conditions at material interfaces.