This is the 2752nd most frequent German word.
klingen
"To sound" or "to ring."
Here 'klingen' is used to describe the sound produced by an object, specifically the bells.
Die Glocken des Kirchturms klingen klar und laut.
The church tower's bells sound clear and loud.
In this sentence, 'klingen' is used metaphorically to express how the offer is perceived.
Das Angebot klingt verlockend, aber ich brauche mehr Informationen.
The offer sounds tempting, but I need more information.
Here, 'klingen' conveys the impression or perception given by the suggestion during communication.