jQuery is a lightweight, "write less, do more", JavaScript library.

It is an open-source project, which means that it is free to use, modify, and distribute. It is designed to be used on websites, but it is also usable for mobile apps and other web-based applications. It can be used in a variety of situations, but it is especially useful for websites that use a lot of JavaScript.

It is a library, which means that it is a collection of functions that you can use. It is not a program, like a traditional programming language. It is a library that you can use to add extra functionality to your website.

The functions are organized in a particular way. Each function is a method, which is a type of function.

It allows you to call the method directly, as if it was a normal function.