puff piece
A piece of writing that focuses on giving exaggerated praise or compliments to someone or something, rather than offering critical or insightful commentary. I thought the article would look at the process the author goes through when writing a new book, but it's just a puff piece. That magazine is nothing but puff pieces anymore—every issue is a "Best of" list.
puff piece
An approving or flattering article, as in That was really a puff piece about the conductor, written by her cousin. The use of puff for "exaggerated praise" dates from about 1600; piece was added in the mid-1900s.