Use the Publish button to push your blog post "live" on your HubPress static site.
The Publish button will save your current work and then publish.
Use the Save button to save changes as you write your post, and keep them private until you are ready to publish to the world.
If you want to remove your post from your blog, click the Unpublish button. The Publish button changes from Publish to Unpublish depending on the published state of your post.