: A marketing term used by sellers to suggest the credentials have a high "hit rate" (meaning many of the logins are still active and valid).

: Use a trusted service like Have I Been Pwned to see if your email has appeared in a known combolist.

: Suggests the data is not specific to one website or region; it likely contains logins for various services (social media, gaming, shopping, etc.) from around the world.

: Change any old or reused passwords to unique, complex ones.

: Likely a specific "brand" or "tag" used by the person who compiled or released the list to distinguish their work.

: Often stands for "Good Game" or is used as a generic tag for high-tier gaming-related accounts, or simply as a signature for certain "cracking" groups. What is it used for?

If you are concerned your information might be in such a list:

: Turn on Multi-Factor Authentication (MFA) for all sensitive accounts to prevent unauthorized access even if your password is known.