The Lambda-CDM Model is the most widely accepted cosmological model that describes the universe's large-scale structure and evolution. It combines the effects of dark energy, represented by the cosmological constant Lambda, and cold dark matter (CDM), which influences the formation of galaxies and clusters. This model explains how the universe has expanded since the Big Bang and predicts its future behavior. In the Lambda-CDM Model, the universe is composed of approximately 68% dark energy, 27% dark matter, and 5% ordinary matter. Observations of the cosmic microwave background radiation and the distribution of galaxies support this model, making it a fundamental framework for understanding the cosmos.