: Suggests these credentials were likely harvested from or are targeted toward social media platforms (e.g., Facebook, Instagram) where users often reuse their Hotmail passwords.

: A text file formatted specifically for automated hacking tools, usually in an email:password format. How These Files Are Used Plot Twist: Combolists Are Still A Threat - SpyCloud

: Indicates the list is an aggregation from multiple data breaches rather than a single source.