Steem Power? More voting / curation rewards and influence over the network. Your vote provides higher $ amount too. Here's a guide: https://steemit.com/steem/@kevinwong/why-should-you-consider-accumulating-steem-power

(Just by voting, u actually get a slice of the rewards. So best if u find good posts which are undervalued, before it gets popular, so u'll get better rewards from your good taste in voting! )