Dark data is the information companies collect but never use. It often makes up...

https://cashsbrilliantperspectives.cavandoragh.org/what-does-garbage-in-garbage-out-look-like-in-vector-databases

Dark data is the information companies collect but never use. It often makes up 60-80% of stored data, quietly taking up space and costing businesses millions—sometimes $2.5 million annually