@eaglespirit So whenever you publish, comment, upvote, downvote, transfer...they are all recorded on Steem blockchain as transactions. It publicly recorded in a so-called block, each block is produced in 3 second by a witness ( your landlord) xD
In each block, there is not only your activities (transactions) recorded but many other steemians' activities also recorded in there (Bcz when you upvote to someone, there is also other people just comment or publish a post at the very same moment). So they are your neighbours in that block.

kkk, hope it's not confusing for you :P