http://q3o3hdjbia2v4hjag567piljrz6gmfwfmxjzaqq4qstmicnmujxp45id.onion/guides/why-metadata-matters
Some examples of metadata include: the subject line of your emails the length of your conversations the time frame in which a conversation took place your location when communicating (as well as with whom) Historically, metadata has had less privacy protection under the law in some countries—including the U.S.