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Firebase is Google's platform for building apps fast. Think of it as a complete managed backend: auth, databases, file storage, and more.

Firebase wins on speed: ready-made backend services, Google-run infrastructure that auto-scales, real-time sync, and one SDK across web, iOS, and Android.

Firebase Authentication handles sign-up and sign-in for you — email, phone, and social providers like Google or Facebook — with no backend auth code.

The Realtime Database is a cloud NoSQL store that holds your data as one JSON tree and syncs every change to all connected clients instantly.

Cloud Firestore is Firebase's newer NoSQL database. Versus Realtime Database it adds richer queries, better scaling, and a collections-and-documents model.

Need to store photos or videos? Cloud Storage for Firebase is scalable object storage you can read and write straight from client code, securely.

Building for the web? Firebase Hosting serves your content over a global CDN with free SSL and custom domains, so you deploy worldwide in minutes.

Firebase's real power is integration: Auth guards your database, Storage URLs live in Firestore docs, and Hosting pairs with Cloud Functions.

You will write Firebase code soon, but first the basics of how a program runs. Here is a minimal Java entry point — Firebase SDKs plug into structures like this.

Firebase offers a wide array of services to accelerate app development. Which of the following is NOT typically considered a core backend service provided by Firebase?

Nice work! You explored the Firebase ecosystem — Auth, Realtime Database, Firestore, Storage, and Hosting. Next: set up your first project.