Now this is great info for me a newbie,this words have always been hard for me to understand,i.e Power up,Power Down,thanks for this definitions and explanations

If you need money Right Now, you can cash out your Steem Dollars to Bitcoin (Convert Steem Dollars to Steem, then Steem to Bitcoin) and convert that to US Dollars or whatever currency you want.

If you DO NOT need money right now, your main choice is whether to turn your Steem Dollars into Steem Power, by Converting Steem Dollars to Steem then Powering UP the Steem to Steem Power.
Why would you convert Steem Dollars to Steem Power? If you think the price of Steem will be Higher in the future, you want to do this.

Because of this info i Powered Up(i can now use this word with ease) for the first time after learning from you,thanks.