Backing up your Blockchain.com Wallet is critical and can be done by following this guide. Creating the backup phrase will secure your ethereum and other cryptocurrency balances.
You also have the option of exporting the individual private key for your ethereum address. This is useful if you accidentally sent unsupported ethereum based tokens (known as ERC20 tokens) to your Blockchain.com Wallet. You can read about this in greater detail here.
To export your ethereum private key, start by clicking on the gear icon (Settings) in the top righthand corner of your web wallet and clicking Wallets & Addresses.
This section has all of your cryptocurrency sub-wallets and addresses. To find your ethereum private key, go to the Ethereum section:
You should see the following message in this section:
As stated, the private key grants complete ownership of and access to any funds kept on your ethereum address, including any ETH or ERC20 tokens that you might have. For this reason, you should never share this information with anyone. Access to a private key means access to the funds associated with the public address.
Click Show to display your private key. Do not display either the QR code or the text to anyone else, and use caution when importing to third-party platforms.