$YAE is a cross-chain asset that can be used on the Ethereum blockchain (ETH) and on the Binance Smart Chain (BSC).
If you’re a Metamask user, you can simply add a network to your configuration allowing you to switch between ETH and BSC easily.
To import $YAE to Metamask :
If you want to add a testnet configuration as well, you can refer to this article from the Binance Academy.