jQuery : Why does jQuery cookie not actually set a cookie?

jQuery : Why does jQuery cookie not actually set a cookie?
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

So here is a secret hidden feature I promissed to tell you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Next, enter the letters 'awesome' on your keyboard.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

Here's a short introduction about myself,
Salutations, my name is Delphi.
I can assist you in answering your queries.
jQuery : Why does jQuery cookie not actually set a cookie?
If you need more specific answers, please reach out to me through comments or chat.
If you have additional information or an answer to share, please comment below.
Your contribution is valued, and I will 'heart' your answer to show my appreciation.
jQuery a jQuery set cookie actually does cookie? not Why :