NLTK is a library for Python that helps programmers work with human language. Imagine you're building a program that needs to understand or generate text. NLTK provides tools for tasks like: Analyzing the structure of sentences (like recognizing nouns and verbs) Classifying text by topic (like figuring out if a review is positive or negative) Creating chatbots (computer programs that can have conversations) NLTK is like a workbench with many helpful tools for working with human languages on computers.