Verbosity is a quality possessed by people who talk a lot while saying very little at all.
The root verb — also seen in verbal — is a clue this word has to do with talking. Specifically, verbosity is the quality of gabbing and blabbing at length. That might sound like a talent, and it sort of is, but usually the words are a bit empty. You could be accused of verbosity if you like to exaggerate or wax poetic. Most of the time, verbosity is empty talk — a whole lot of nothing dressed up in too many words.