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Monad
A monad is just a monoid in the category of endofunctors.
In Software Development, this refers to an Applicative Functor that provides a method for applyling a function taking a bare value and returning a wrapped value to a value already wrapped in that same type.
In Haskell, the function to do this is called bind, and is available as the
infix operator >>=. This method is useful for sequentially applying functions
which generate values wrapped in a Monad, abstracting away logic between each
sequential application. This behavior leads some people to refer to Monads as
"programmable semicolons", referring to imperative, C-like languages in which
each line of code is terminated with a semicolon and executed in sequence.
Haskell's "do notation" provides syntactic sugar for codifying such sequences.
(>>=) :: Monad m => m a -> (a -> m b) -> m b