Choose your audience
You can decide which user groups will have access to the content that you create. Make it public, or release to specific groups only.
Generally, accounts will only be linked to one app. If your account is linked to multiple apps, however, you can choose which app your should content should be published to.
If you want everyone on your app to access a story/stream, then choose this option.
Choose "Public Story" / "Public Stream"
Public publishing is great if you have a public app (meaning that anyone can sign up without being invited).
It's also ideal if you have a preview or introduction story that you want everyone to see before you release group-specific stories.
This option is perfect if you have specific stories for specific groups.