it's a open-source React UI Kit that allows anyone to build web3 apps without prior web3 knowledge.
The premise is that on a top level, developer doesn't need to know about gas, transactions, smart-contract – we can have good defaults that work for any wallet and that provide good UI/UX and feedback.
Developer's job is building UI in React, web3-sdk handles all the rest. Developer only decides which data to take from inputs, which transactions to create on each button click – and every blockchain detail is handled by us; or presented to end user to decide.
As input, the SDK receives only the list of smart-contract addresses used in the app ; and a few API keys: Etherscan, Infura, Alchemy (optional), Onboard.js, Buildship (later when we're bigger).