Cryptocurrency is a new world for me. Why is Steem not on Binance?

I was wondering why Steem was not on Binance?
I use coinbase and Binance and had to figure out how to get steem coins.
At least I found out about Steemit and have had a lot of fun here so far.
I was still wondering why the coin itself is not on the exchange, is it available on any other exchanges?
In the future does anyone think Steem will go on some other exchanges?

Thanks in advance for the info :)