Background: some companies use all-company or department channels that might not be relevant to all users. Alternately, they might have a low-importance or off-topic team to handle non-essential or fun topics.
Users might want to prioritize their notifications based on what team is sending the message. Let users turn off notifications (visual or audio) from specific teams or conversations while still being included in that team. This allows them to check the team at their leisure and still get notified of important messages in other channels.