Dark data is the stuff companies collect but never use—up to 80% of their...

https://www.first-bookmarkings.win/dark-data-is-all-the-information-companies-collect-but-never-use-like-old-files

Dark data is the stuff companies collect but never use—up to 80% of their information just sits there. It matters because it takes up space, slows systems down, and can cost businesses millions every year in storage and missed insights