Feeds
On the left side, you can see the list of feeds:
Click on the selected feed to to view the announcements related related to the feed. You can switch between feeds.
You can add a feed by clicking the "Add a new feed" button on the top panel.
...
Next to the name of the feed, you can see its location (Jira 
Software or Jira Service DeskManagement 
), place (e.g. Dialog 
, Flag 
, Full Screen 
etc.) and a little "abcABC" icon representing the color scheme used in the feed.
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Click > to see the number of announcements, edit or delete the feed, add an announcement and go to the Recorded Responses.
Announcements
On the right site, you can see the list of announcements.
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To the left of the announcement's name you can see its type:
a) Simple text 
b) Single issue 
c) Multiple issue issues 
Additionally, the list of Feeds and Announcements works on the principle of "Drag & Drop", which means that you can change their location on the list.
In the case of a list of announcements, this works only if you previously selected feed (the default view "All of the announcements" is not enabled).
By default, newly created feeds and announcements appear at the end of the list.
Displaying Announcements
To improve navigation, created announcements are not displayed in the Manage feeds tab.
They will be visible only after switching to a different tab.