Choose your audience
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"
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.