About channels and sections in News Publisher
Content you publish using Apple News Format appears in your channel, which represents your publication in News. A publication can be a magazine or a newspaper, for example.
Channel content is organized into sections. Every channel has one default section, which contains the main content of the channel. You can add other sections to group your content by topic or type. For example, an entertainment channel might have music, TV, and movie sections. Although you can define up to 25 sections, 6 to 8 sections is optimal.
Channels also show All Published Articles in the sidebar—a place that lists all published articles from all sections of the channel.