Water is a clear, colorless, odorless, and tasteless liquid that is essential for all forms of life. It is the most common substance on Earth and covers about 71% of the planet's surface, primarily in oceans, rivers, and lakes. Water is vital for hydration, maintaining body temperature, and supporting biological functions in all living organisms. It is used in countless applications, from drinking and cooking to industrial processes and agriculture. With its unique properties, such as the ability to dissolve many substances, water plays a key role in maintaining life and supporting various ecological and economic systems.