Dark data is all the info your company collects but never uses—often 55% of it...

https://ace-wiki.win/index.php/How_Do_You_Set_Up_a_Defensible_Deletion_Workflow%3F

Dark data is all the info your company collects but never uses—often 55% of it just sits there. This inactive data costs money to store, exposes you to security risks, and clutters AI systems with noise, making it harder to get real insights