A blurb is just a short written peice about something. Usually it's in reference to a newspaper article that briefly mentions a barely newsworthy item.

A small, dense amount of descriptive text which can be fired like a projectile.

A small amount of text, used beneath photographs in newspapers, or to thank someone in a book.

a short, concise amount of descriptive text used for professional warm introductions

A dose of highly concentrated spin intended to deflect direct perception and critical thought while presenting a desirable or attractive image to the public.

The short summary of a book, usually on the inside cover or back, that most people read so they can say they read the book

Blurb, from blurt and blubber. A short ‘descriptive’ piece of writing, written without much thought or content, and which can be safely ignored.