Privacy: Add explanatory link under channel role settings
When creating a new channel, there's a link to "Read more about channel permission roles" that gives a good description of what the different options do. This doesn't show up below the same drop-down in the channel settings, and it would be useful there.
Similarly, a quick sentence about "If you don't know what to pick, here's a default option" would be helpful for the channel create page to reduce friction.