Functions and Modules in Python focus on organizing code into reusable blocks to improve readability, maintainability, and efficiency. It enables developers to structure programs logically and reduce repetition through modular programming practices. This training explains core concepts such as function definition, parameters, return values, scope, and recursion. It also covers modules, libraries, imports, package creation, and code reuse techniques in Python applications. You will learn how developers use functions and modules to build scalable applications, automate tasks, and improve code quality. The course also highlights best practices for writing clean, efficient, and reusable Python programs.