Non-contributors can submit posts to a Space for approval. When a submission is accepted, it is immediately published.
For followers or users unaffiliated with a Space: You can submit content to any Space that is accepting submissions. You will be notified if your submission is accepted.
For Space owners, admins, & moderators: You will be notified when submissions are made to your Space, and you can approve or decline them from the “Submissions” tab. More information can be found at How do I moderate Space submissions?.
Admins can also disable submissions for their Spaces on the “Settings” page.