In your own words, explain what Quantum Mechanics is.
Without google, express what you believe quantum mechanics to be, and perhaps why it is important.
Now, as a disclaimer, I'm asking this because I'm genuinely interested in what people have to say. This is a judgement-free thread. There is a range of users here of different age groups who have been exposed to different information. I have chosen to take a path in my life which exposes me to information about this subject, where as others may have not. Others may have, and perhaps they may be far more knowledgeable of the subject than myself. Doesn't matter.
I feel as though quantum mechanics is often regarded as some mysterious unknowable entity of knowledge, or is made out to be something that it is not.
So I want to know what you believe Quantum Mechanics to be. What is it about, why is it a thing, etc.