In Python, a list is a built-in data structure used to store a collection of items or elements. It is an ordered and mutable sequence, meaning you can change, add, or remove elements after the list is created.

Lists are defined using square brackets [] and can contain elements of different data types, such as integers, strings, floats, and even other lists. Each element in a list is assigned an index, starting from 0 for the first element, allowing for easy access and manipulation.