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Resteeming can be compared with retweeting on Twitter. If you resteem one of my posts it will be displayed on your profile. If people upvote it there you will get a curation reward but "the biggest sum" of money will still go to the original creator. Resteeming is a great way to spread a post because you can resteem a resteem, and resteem that resteem and... Well you get me ;)
Glad you liked it :)

Thanks so much for that explanation! It makes total sense! Happy New Year!