An Elixir module is created using the `defmodule` keyword, followed by the module name and the definition of functions and data it encapsulates.

Creating a module in Elixir is straightforward and follows a simple syntax. Modules serve as containers for functions, data, and other modules, providing a way to organize code logically and promote encapsulation. To define a module, you start with the defmodule keyword, followed by the name of the module (usually written in PascalCase), and then you enclose the module's content in do...end blocks. For example, you might define a module like this: defmodule MyModule do ... end. Inside the module, you can use the def keyword to define functions that encapsulate specific behaviors or logic. Additionally, you can define module attributes using @ to hold metadata or configuration values. Modules can also include documentation strings using @doc, which provide descriptions for functions and modules, enhancing code readability and maintainability. Furthermore, Elixir supports nested modules, enabling developers to organize related functionality hierarchically. By leveraging modules, Elixir developers can create well-structured and maintainable applications that promote code reuse and clarity.