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

https://stateofseo.com/how-do-pharma-teams-tag-research-files-with-project-codes/

Dark data is all the info your company collects but never uses—up to 55% of it. This inactive data isn’t just wasting storage; it can cost you millions and create noise that confuses AI systems