What is jQuery?
How does it help us as developers?
helps with animated effects, ajax requests, Manipulating the DOM, Creating image slideshows, Making drop-down menus, Creating drag-and-drop interfaces, form validation etc.
Why do we have 2 version of jQuery - minified and uncompressed?
The uncompressed .js file is easy to read and modify, and fasterto down load.
The minified .js file is faster to download and run.