: A claim that the data has a high "hit rate," meaning the credentials are fresh and likely to work on the specified platforms.
: The list is optimized or "cleansed" for popular subscription and gaming services.
: Use services like Have I Been Pwned to see if your email has been part of the breaches that fuel these databases.
: Use a unique, complex password for every service. If one site is breached, a "combo list" like this becomes useless for your other accounts.