A wallet is a secure place to store your digital items, whether they be cards, boards, trinkets, ETH or anything else you may come across.
When you purchase anything from the Gods Unchained store, trade a card on the Immutable X marketplace, or receive an expansion pack reward in Weekend Ranked, these are all sent and stored in your wallet, but only if you have one linked to your Gods Unchained and Immutable X accounts.
Wallets can also be used beyond Gods Unchained and Immutable X. They are the universal system that the Ethereum network uses to identify individual users, so all trades are done using wallets. Every wallet has a unique wallet address, and this is the thing that links your digital assets to you. What’s more, a wallet is completely free to set up and own.