What do the stars in the corner of Mario Kart mean?

What do the stars in the corner of Mario Kart mean? The stars allow you to save Highlight Reels as your favourites. You may then view these highlights in Mario Kart TV. Your favourites are available in the Favorites tab, by pressing R or ZR twice after opening MKTV. You may remove favourites from that tab by pressing -.

The stars allow you to save Highlight Reels as your favourites. You may then view these highlights in Mario Kart TV. Your favourites are available in the Favorites tab, by pressing R or ZR twice after opening MKTV. You may remove favourites from that tab by pressing -.