Before a flow is deployed to an environment, it is stored as a draft, and only visible to studio users in the preview window. Only users from your organization who are signed in to Formsort will have access to the studio.
Once you go through the deployment workflow, your form will be live and accessible publicly (unless you have restricted access to the form with authentication). Further edits will not be automatically reflected in the live flow until you re-deploy them.
After deployment, you can revert to existing revisions, or force responders onto a specific revision. Read more about that in History.