Dark data is all the information your company keeps but rarely uses—around 55%...

https://www.bookmarking-maze.win/dark-data-is-the-information-your-company-collects-but-doesn-t-use-often-55-or

Dark data is all the information your company keeps but rarely uses—around 55% of it just sits idle. This hidden data adds unnecessary costs, creates security risks, and clutters AI systems with noise