Yes, you can Resteem some else's post without hurting your voting power or your Steem Power (SP), to help promote them to YOUR followers. Like a retweet on twitter. So say you have 200 people following you, you could promote a friend's post that you like. And now it will be seen on all 200 of YOUR followers' "feed". Your feed is what the people that only you follow have posted today.
You'd probably never find my post if your weren't following me, because it would be lost within the thousands of posts that everyone around the world made today.
So if you are following @jbcoin, and I make a post about a new coin I got today, when you click on your feed, mine is in there somewhere.
If you Resteem my coin post, now all of your followers see my coin post too. We probably have a few followers in common, but for the most part you are helping me reach all new people.
Man... very nice of you to write the explanation for such a limited audience, haha. I appreciate you helping me out :D
No problem at all, thats what we do. I felt just like you at the beginning. Fuck this shit, waste of time, can't get off the ground. You meet people that help you. You join groups to support little guys. And before long you're helping others yourself. Everyone helping each other just a little, but it adds up. Either new users with upvotes, or spending tiny amount to give your buddy's post a nice bot upvote payout, or just helping to promote their good content. I've got youtube videos with just a few watches over years...same concept.
Nice thing about the blockchain, another new guy a year from now can still read it and be helped. It's here to stay.