Ether, or ETH, is the native currency of the Ethereum blockchain and it is required to interact with the Ethereum network (though the Sequence Wallet has a user-friendly workaround for this, explained here). You can obtain ETH with a credit or debit card directly inside your Sequence Wallet by clicking on “Add Funds” and then selecting a payment provider in the “Debit or Credit Card” section.
Alternatively, you can purchase ETH on an exchange, such as Coinbase, Newton or others, and transfer it to your Sequence Wallet. Click on the “Receive” button in your Sequence Wallet and copy your wallet address. When sending ETH from an exchange, input your Sequence Wallet address. Be mindful which blockchain network you use to transfer funds, Sequence is currently compatible with Ethereum and Polygon.