Select the “Publish” button on the “Update” menu. This will bring up the “Share on Steam Workshop” menu.
With the workshop title and workshop description section, the user can decide how their item is described and titled on the steams workshop.
The “Public”, “Friends Only” and “Private” options will decide who can see the published item on the steam workshop.
Once all options have been selected select the “Create Workshop Item” button to publish the item to the steam workshop.