This scope lets an app "View messages, activity, and files in public channels"
This OAuth permission scope works with these Web API methods and Events API events.
channels.history - Fetches history of messages and events from a channel.channels.replies - Retrieve a thread of messages posted to a channelchannel_history_changed - Bulk updates were made to a channel's historymessage - A message was sent to a channelmessage.channels - A message was posted to a channel