It’s called ticker and it shows you the things you can already see on Facebook, but in real time.
And no, you can’t control it directly.
Who can see stories about my comments and likes in ticker?
To control stories about your commenting activity in ticker and news feed, always check who can see the privacy of the posts you're commenting on. Learn more about sharing privacy. If you aren't comfortable with who can see the post, please don't comment on it or like it. If you do, a story about your activity will be eligible to appear on Facebook, including on your timeline (profile), in news feed and in ticker.