Dark data is the vast amount of information companies collect but never use —...

https://blogfreely.net/samuel-wang09/are-there-really-68-built-in-sensitive-data-scanners-in-komprise

Dark data is the vast amount of information companies collect but never use — around 60-80% of it just sits inactive. This unused data takes up storage, slows down systems, and can cost businesses an average of $2.5 million each year