If you are powering up, your votingpower goes up, means if you vote for someone they get some cents for it, yourself get a share from this Post at the day the Post gets payed out. Powering up is very easy, just klick next to your Steem in your wallet and choose Power up.
More Steem Power = bigger votes, more curation rewards.
https://steemit.com/faq.html#What_is_the_difference_between_STEEM__STEEM_Power__and_Steem_Dollars
You power up by buying Steem and powering it up on your wallet page.
If you are powering up, your votingpower goes up, means if you vote for someone they get some cents for it, yourself get a share from this Post at the day the Post gets payed out. Powering up is very easy, just klick next to your Steem in your wallet and choose Power up.