Sharing a folder on the network

I have right-clicked a folder, selected "Share With" then "Share".

I have right-clicked a folder, selected "Share With" then "Specific people" then added "Everyone".

My computer name shows up as a list item on the left panel but does not show up as an Icon in the Main Screen.

My other computers on the network do not show the Icon or the left panel entry.

What am I forgetting?