Rubber modified bitumen enhances the performance of asphalt by improving its elasticity, durability, and resistance to cracking and deformation. The incorporation of rubber particles increases the viscosity and adhesion properties, allowing for better performance under varying temperatures and loads. This modification also enhances resistance to aging and oxidative damage, leading to a longer service life for asphalt pavements. Overall, rubber modified bitumen contributes to improved performance and sustainability in asphalt applications.