Dark data is the hidden information your company stores but rarely uses—often...

https://www.first-bookmarkings.win/dark-data-is-the-inactive-or-hidden-information-lurking-in-your-storage-often

Dark data is the hidden information your company stores but rarely uses—often making up 55% of all data. This idle data can cost millions, create legal risks, and clutter AI projects with irrelevant noise