Steem is a platform on the block chain. Steemit is a project runs on the steem platform where each interaction (anytime we post, or upvote a post, or comment like we are right now) counts as a transaction on the blockchain and users are paid rewards Steemians are people like you and me who use Steemit and other projects on the steem platform such busy.com, dtube, dsound, steepshot, etc. (call these Steemit alternatives if you like, interactions earn rewards the same way) Streemian is/was/is/was, among many things, a popular tool used by Steemians to schedule their posts to a preferred time and to send steemit blog posts to other blogs or social media networks using RSS feeds. Streemian is also used a content curation tool. FYI the @curie bot offered by Streemian is meant to offer incentives to (much) bigger fish than us to use the bot to find and upvote new content. Not so much for little fish, we mostly create the content and comment on it. Hope that helps somewhat :)