Hey I randomly list some points to mention that come into my mind:

• Steemit what is it for?
• Blockchain
• Account creation
• Keys
• STEEM / SBD / SP difference
• Voting Power
• Upvote effects (curation rewards, post payout)
• Codex of original content
• Communities (pal, msp, whaleshares, lfn, denmark community?)
  (- Attention: scam, plagiatrism)
  (- some ppl to follow with good content)
  (- bid bots)
  (- chats?)

(- q: ppl will compare it to fb. Maybe prepare answers)

J