The S-Process, or slow neutron capture process, is a nucleosynthesis mechanism responsible for the formation of certain heavy elements in stars. It occurs when atomic nuclei capture neutrons at a slow rate, allowing them to undergo beta decay before capturing additional neutrons. This process primarily takes place in asymptotic giant branch (AGB) stars, where conditions are suitable for neutron capture. During the S-Process, elements such as barium, lead, and strontium are produced. The process contributes to the abundance of these elements in the universe, influencing the chemical composition of stars and the interstellar medium. Understanding the S-Process helps astronomers study the lifecycle of stars and the origins of elements.