Definitions
User
An individual who uses the MetaMask Institutional Portfolio Dashboard and wants to stake ETH from it.
Heads Up
As a staking provider, your definition of a user/customer might not map 1-to-1 with this definition of a user. For instance, some staking providers handle customers, where customers have many users.
MMI
Stands for MetaMask Institutional.
Staking Provider
You. An entity who provides staking services and infrastructure on Ethereum Mainnet.
SSP
Stands for Staking Service Provider. Same as Staking Provider.