What is Backend?

Backend development is the part of a website or application that works behind the scenes. It manages data, business logic, user authentication, and communicates with databases and other services.

Unlike frontend, the backend is not visible to users. It acts as the 'brain' of the system, processing requests and sending appropriate responses to the frontend.

Common backend technologies include Node.js, PHP, Python, Java, and frameworks like Express.js, Laravel, or Django. Databases like MySQL, PostgreSQL, and MongoDB are used to store and retrieve data.

For example, when you log into a website, the backend checks if your username and password match the records in the database and then lets you in — or not — depending on the result.

In short, the backend ensures everything on the frontend works properly by handling the logic, data flow, and server-side operations.