Dark data is the information companies store but never use—up to 55% of all...

https://wiki-fusion.win/index.php/How_Does_Dark_Data_Make_AI_Answers_Worse%3F

Dark data is the information companies store but never use—up to 55% of all stored data just sits there. This hidden stash matters because it adds to storage costs, risks data breaches, and clutters AI projects with useless noise