AR0w

Something like a start page
That remember you what this sub is about 
Because accessing sub is manually in sn

Also when someone create a new sub that pinned post will appear in the home feed so you know a new sub was added

Building base for SN user generated sub update

> First every sub need a pinned post that contain a description of the sub and the name of it in the top , the admin of it ,posting fee... All this in a box in the top not like now

perhaps the sidebar could be useful here, and maybe an expandable gear icon on mobile to show these settings… not sure it needs to look like a pinned post