Dark data is all the info companies collect but never use—think old emails,...

https://technivorz.com/why-does-dark-data-matter-for-ai-projects/

Dark data is all the info companies collect but never use—think old emails, logs, or files gathering dust. It’s huge, making up 60-80% of stored data. That’s a big deal because keeping and managing it wastes around $2.5 million every year