Admin

Short for "administrative function", this is a generic transaction type that refers to any action where the user changes the state of a contract, without triggering asset transfers relevant to him.

For example, submitting a transaction to enable a particular functionality in a protocol, or executing admin-level functions on contracts, would fall under this type.

MEV Transaction

This type is used to identify transactions executed by MEV bots or similar.

Gambling Transaction

This type is associated with on-chain gambling/betting transactions.