This is the “Aside” Post format. WordPress defines “Aside” as a brief snippet of text that isn’t substantial enough to feel like a complete blog post.
Someone on the WordPress forum says that “Asides (1) do have URLs, (2) you can assign Categories to them, and (3) they do appear in your RSS feed. :)”
“I never tried to prove nothing, just wanted to give a good show. My life has always been my music, it’s always come first, but the music ain’t worth nothing if you can’t lay it on the public. The main thing is to live for that audience, ’cause what you’re there for is to please the people.”