what does this line of code do w.r.t. sticky header?

Question

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>

What's the use of this line "in sticky header example" ? I have seen this in a sticky header example.

source-code link : http://netdna.webdesignerdepot.com/uploads7/how-to-create-an-animated-sticky-header-with-css3-and-jquery/download.zip

website link - http://www.webdesignerdepot.com/2014/05/how-to-create-an-animated-sticky-header-with-css3-and-jquery/

Answer 1

There are 2 ways to refer the Libraries in your project.

1. Pointing to local copy

2. Pointing to hosted Libraries. [ Faster and easy comparing to local copy]