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

https://brookssniceop-ed.bearsfanteamshop.com/is-dark-data-the-same-thing-as-unstructured-data

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