In one sentence: The dark web is a hidden part of the internet that people usually reach only with special software.
Why it matters: A US Library of Congress report says it is used for privacy reasons and also for crime, such as selling stolen personal information. A notice that your data was found there is a reason to update the password for that account. There is no need to worry.
One thing to do: If an account of yours was in a breach, change its password today and turn on a second step.
Related terms: data breach, identity theft, credential stuffing
Checked: 25 Oct 2026.
