Tapioca is a starchy substance extracted from cassava root, a plant native to South America. It is commonly used as a flour in gluten-free baking and can be found in various Brazilian dishes. Tapioca has a unique texture that is soft and slightly chewy, making it a popular ingredient in puddings, desserts, and snacks. It can also be used to make a type of pearl-like pudding known as tapioca pearls or boba. Overall, tapioca is a versatile ingredient that can add a distinct flavor and texture to many different dishes.