I love all of the great infographics that @Steemitguide has put together! He/she has done a great job of succinctly answering a lot questions that we all have about the Steemit platform.
As an example, here is the the post that they made for introducing Steemit to newcomers: https://steemit.com/steem/@steemitguide/steemit-101-who-need-s-a-decentralized-social-network-and-what-makes-steemit-so-special