The combination of technologies used to build and run an application.
A tech stack is the specific combination of programming languages, frameworks, libraries, databases, and tools used to build an application. For example, a common modern stack is React + Next.js + Supabase + a Deployment platform -- this handles the Frontend, Backend, database, and Hosting. Choosing the right tech stack matters: too complex and you will never finish; too simple and you will outgrow it. The best approach for beginners is a simple, well documented stack that lets you build real apps without unnecessary complexity.
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