Commonplace Books and Echo Chamber Effect

I have a fascination for terms and jargons. My eyes lit up when I feel that the connotation of something I read is more than skin deep.

Commonplace books: I saw this word in a post titled, The Glass Box And The Commonplace Book. Wikipedia defines the words as "Commonplace books (or commonplaces) were a way to compile knowledge, usually by writing information into book."

Echo Chamber Effect: Echo Chamber effect is used to describe how media outlets follow stories reported by a major media outlet.