Recursive snapshot expiration and offsite replication query.

I don't understand how snapshots work with recursive replication. I think that sums up what this post will be.

Basically, I'm setting up one local FreeNAS machine (name: freenas1) to replicate to another offsite FreeNAS machine (name: offsite). However, I am not sure if I want "Recursively replicate and remove stale snapshot on remote side:" under "GUI > Storage > ZFS Replication > Replication task settings" enabled.

I probably just don't understand what "remove stale snapshot on remote...

Recursive snapshot expiration and offsite replication query.