Firebase CLI is a command-line interface for Firebase that allows you to interact with various Firebase services from your terminal. It provides a variety of tools for managing your Firebase projects, including deploying and testing your app, managing your database, and more. You can install Firebase CLI using npm (Node.js package manager) by running the following command:
npm install -g firebase-tools
You can find more information about Firebase CLI on the official Firebase documentation website: https://firebase.google.com/docs/cli