# JavaScript FAQs

## What is JavaScript?

JavaScript is a browser-based programming language that makes web pages more responsive and saves round trips to the server.

## What is jQuery?

jQuery is a library of the JavaScript functions that you're most likely to need as you develop websites.

## Why is jQuery so popular?

Three reasons:

- It's free.
- It lets you get more done in less time.
- Its functions are cross-browser compatible.