Dark data is the information companies store but don’t use, often making up 55%...

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

Dark data is the information companies store but don’t use, often making up 55% of all data. It costs money to keep and can create security risks. Plus, it adds noise that AI has to sort through, slowing down insights