Dark data is the inactive or unused info companies store but rarely access—up...

https://www.bookmarking-keys.win/dark-data-refers-to-the-55-of-stored-information-that-businesses-collect-but

Dark data is the inactive or unused info companies store but rarely access—up to 80% of it. This hidden clutter wastes money, sometimes costing $2.5 million a year, and creates noise that confuses AI projects