Schwätzen means to gab or chat about topics of low relevance and in a thoughtless manner which has no value. The Germans speak of dummes Geschwätz – dumm is stupid, dumb, idiotic, asinine, foolish.
Geschwätz from the verb schwätzen – when people in public spaces blab out loud, when students gab during classes, or colleagues do the same during meetings. A Schwätzer is not shunned, but disliked, and not respected. A Schwätzer talks too much and does too little.