The ETH Address is the wallet your ENS name points at. ETH sent to yourname.eth lands in the wallet listed here. It's one half of how a name resolves: the ETH Address on the name says which wallet the name belongs to, and the primary name on the wallet says which name to display. Apps need both to line up.
When you register through the ENS App, it sets the ETH Address to the wallet you registered with, so you don't need to do anything for the default case.
Good to know
Once you change it, funds sent to
yourname.ethgo to the new wallet, and the old wallet stops receiving them.Without an ETH Address set, the name can't be used as an Ethereum Mainnet primary name. A Default primary name is a separate setting: it needs the Default address, which has to be set before the Default primary name can be.
The same name can hold separate address records for other chains too; see Add wallet addresses for other chains.
The ENS App handles
.ethnames, their onchain subnames, and DNS names you've imported. For project subnames likebase.ethoruni.eth, use the project's own site.
When you'd change the ETH Address
The common cases:
Receive payments at a different address. Common when you've moved to using a new wallet.
You got the name from someone else. A transfer moves the name, not its records — the ETH Address still points at the previous owner's wallet until you change it, so payments keep going to them.
Set a primary name from a different wallet. An Ethereum Mainnet primary name only sticks if the name's ETH Address points at the wallet you're setting it from. If the Set as Primary Name button doesn't appear at app.ens.domains, the ETH Address probably isn't set to the wallet you're connected with. Either switch wallets, or change the ETH Address.
How to set or change the ETH Address
Connect with the Manager (the wallet that controls a name's records) and have a bit of ETH on Ethereum Mainnet for gas. No other cost.
Open Edit Profile. Go to app.ens.domains and connect your wallet. Search for your name, open the Profile tab, and select Edit Profile.
Set or update the ETH Address field.
Approve in your wallet. Most confirm in 1–2 blocks (12–24 seconds); busy networks can take longer.
Once it lands, funds sent to yourname.eth go to the new wallet.