What’s the meaning of the headphone symbol on top of the springboard?

The headphone symbol is our so-called “News Feed Controller”. The section is showing all of your new, yet unheard WOIZZES. You now have the option to filter those messages by “Following” (channels or contacts you’re following), “Private” (1-to-1 or group-messages) and “Notification” (comments or likes posted to your public WOIZZES). You’ll also receive a special push notification to easily show you which section is filled with new WOIZZES.