How can a beginner trader make use of 'volatility of volatility'

External question — Quantitative Finance Stack Exchange Author: Victor123 Original post: https://quant.stackexchange.com/questions/18051 License: CC BY-SA 3.0 — https://creativecommons.org/licenses/by-sa/3.0/ Adaptation: HTML converted to plain text; contact email addresses removed. For a beginner option trader in equity options, how can he use this metric that is provided by his broker/data vendor? How can he use this metric to gain an added understanding of the option pricing/mispricing?