Node.js is known for handling lots of small waiting tasks well: messages, file reads, API calls, and database requests. Its event-driven style helps apps stay responsive while many users or services are interacting at once.

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Many Node.js projects are built from npm packages: reusable code shared by developers around the world. Packages can add features like authentication, testing, logging, payments, image processing, or web server tools without starting from scratch.

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Node.js often sits behind the scenes of apps people use every day. It can power REST APIs, chat systems, dashboards, build tools, bots, streaming services, and automation scripts that save teams repetitive work.

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Node.js skills connect to roles and communities around backend development, full-stack web apps, developer tooling, cloud functions, open-source packages, and startup prototypes. People use it to ship small scripts, production APIs, and large services.

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Review this chapter with practice based on your mistakes.