SNO+ is a large underground neutrino detector located in the Sudbury Neutrino Observatory in Ontario, Canada. It is designed to study neutrinos, which are tiny, nearly massless particles that rarely interact with matter. The detector uses a large volume of heavy water to capture these elusive particles, helping scientists understand their properties and the processes occurring in the universe, such as those in the Sun. The primary goal of SNO+ is to investigate neutrino oscillation, a phenomenon where neutrinos change from one type to another. This research contributes to our understanding of particle physics and the fundamental forces of nature, providing insights into the behavior of matter and energy in the cosmos.