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Hi @rebeccamorgan - Welcome to steemit! Here's a very light breakdown to help out:

  • Steem is the main token of the Steem Blockchain.
  • Steem Power is vested STEEM and gives you voting power. The more you have, the increase in your vote weighting power!
  • Steem dollars are currency you can spend to buy items in the marketplace and should typically hold 1:1 ratio with the US Dollar.

Hope this helps a bit!

Steem power also gives interest but has to be powered down over a 104 week payout period if you want to withdraw.

Coin Marketplace

STEEM 0.18
TRX 0.14
JST 0.030
BTC 58635.35
ETH 3152.96
USDT 1.00
SBD 2.44