Oh, so you are newbie here?
Welcome :D
Some good sources of information about Steemit for you:
https://steemit.com/faq.html
https://steemit.com/welcome
Some more good read:
https://steemit.com/steemit/@donkeypong/announcement-steemit-101-e-book-released-for-free-part-1
https://steemit.com/steemit/@donkeypong/announcement-steemit-101-e-book-released-for-free-part-2