Clear the public chat – If the moderator misses a few messages on public chat because of a lot of clutter.
Both, viewers and moderators can avail the public chat functionality.
fig 1: public chat option as a communication link between viewers and moderator
But only a moderator will have the ability to clear public chat,
To clear public chat:
Click on the hamburger menu visible just opposite to “Public chat”, select “Clear” as shown in fig 2

fig 2 : showing clear option in public chat
Now a message appears on public chat which says that it had been cleared by the moderator

fig 3: message showing that chat was deleted