Haskell is a functional programming language known for its strong static typing and lazy evaluation. It allows developers to write code that is concise and expressive, making it easier to reason about complex problems. Haskell emphasizes pure functions, which means that functions do not have side effects and always produce the same output for the same input. One of the key features of Haskell is its powerful type system, which helps catch errors at compile time rather than at runtime. This can lead to more reliable and maintainable code. Haskell is often used in academia and industry for tasks such as data analysis, web development, and financial modeling.