https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css
Jquery is lightweight, feature-rich Javascript library with capabilities of all function of Javascript, CSS3 compliant and cross-browser support. It has collection of Javascript libraries. Professional websites may have animations, exhibit effects when visitors perform some actions like clicking, pressing keyboard, closing documents which generate some effects, AJAX capabilities etc.This is quite easy because of JQuery implementation in your website.
Write Less,Do More slogan.As developers has to write very less amount of codes to achieve the same function in comparison to Javascript itself, the slogan is quite appealing.
You can setup JQuery in two ways.
One is download JQuery file, unzip, save on the same location of HTML file and write script code to point the location of JQuery file. Second method is write source code of URL provided by Content Delivery Network(CDN).
For both methods, go to http://jquery.com.