You can hide some content sources available in the discover section. You simply need to locate the grey cross icon at the top left corner of the discover section. When you click on the cross icon, a new window will pop-up on your screen listing the various news sources around the world. By ticking the box next to a news source to show a blank grey color, you have successfully hidden that news source from appearing on the discover section. If a news source has a blue box, that means it is not hidden from the discover section.