Really interesting article and video here from @steemitguide explaining what Steem Witnesses are and what they do.
Great information for anyone starting out on Steemit who wants to learn more.
I couldn't find a link to resteem, so created this post. Enjoy!
Here is a link to the original article:
https://steemit.com/steem/@steemitguide/steemitguide-what-is-a-exactly-is-a-steem-witness-and-why-every-user-should-vote