What is Illuminati?
You're asking the wrong question. It's not "what is Illuminati?" Rather, it's "what is THE Illuminati?"
The Illuminati is a secret society formed in 1776 by a man in Bavaria named Adam Weishaupt. They called themselves the "enlightened ones" and believe they would reform the world to make it more sophisticated.
I suggest learning the history of the Illuminati.
Does the Illuminati still exist?
Existence of the Illuminati today remains a mystery to most. However, clues everywhere in politics, the occult as well as movies and music point toward it's influence.
This question is irrelevant considering today's power structure have the exact same goals of the Illuminati and are moving in that direction.
What are the goals of the Illuminati?
The Illuminati literally set out to achieve a self-composed list of goals and prerequisites for control of the world.
You're kidding, right?
Nope. Actually, most influential people are at least aware of this.