In Norse mythology, Yggdrasil refers to the immense and central world tree that connects all nine realms. Considered a sacred symbol, it represents the interconnectedness of life, death, and rebirth. Yggdrasil sustains the cosmos, and its roots reach into various realms, housing different beings. This tree embodies the flow of time and existence, symbolizing the cyclical nature of the universe. Yggdrasil's significance extends beyond mere symbolism, representing the foundation of Norse cosmology and the complex relationships between gods, humans, and the natural world.