Help me understand satanism, please?

No rude answers, please.
What are the basics about satanism?
What does 'hail satan' mean?
What rituals are done?
What about magic?
Is it a religion or philosophy?
Thanks in advance! (:
Update: I'm not asking about Satan. I'm asking about Satanism. I don't want to know how to be one, I want to understand it.
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