The web and how it moves

A way for one piece of software to ask another piece of software to do something.

Proving who you are to a website, app, or API.

The part of an app the user doesn't see — the server, the database, the logic that runs behind the screens.

The app you use to open websites — Chrome, Safari, Firefox, Edge, and so on.

Automated pipelines that run your tests and deploy your code whenever you push changes.

The software making a request — usually your browser or an app you're using.

A program that stores your app's data in an organised way, so you can save, find, and update it quickly.

Putting your code somewhere the world can see it.

The phonebook of the internet — it turns a domain name into the actual address of a server.

The name you type into a browser to reach a website — like google.com.

A specific address on an API for a specific thing you want to do.

The part of an app you see and click — the screens, buttons, layouts, everything running in your browser.

Paying a company to run your code on their servers so the world can reach it.

The language web browsers and servers use to talk to each other.

A hosting service that deploys web apps from GitHub — close sibling to Vercel.

A standard way to let one app access your account on another app without handing over your password.

The live version of your app — the one real users are using right now.

The message your app sends when it wants something from an API or a server.

The message that comes back after you've sent a request.

The most common style for building APIs. REST APIs use web addresses (URLs) and standard actions like GET, POST, and DELETE, so different tools can talk to them the same way.

Reverting a deploy back to the previous version, usually because the new one broke something.

A computer whose job is to answer requests from other computers.

A near-identical copy of your live app, used to test changes before they go to real users.

A short number in an HTTP response that says what happened. 200 means OK, 404 means not found, 500 usually means the server broke.

The full web address of something — the whole string starting with https://, including the domain and the path to the specific page.

A hosting service that specialises in deploying web apps quickly, often straight from GitHub.

A way for one service to call your app automatically when something happens — instead of your app having to keep asking.