Wallets are where you keep your assets - whether USD, GEL, or Crypto. Each currency has its own wallet, all managed from the Wallet page.
You can deposit crypto from an external wallet into your Cryptal wallet if you have generated an address. You can generate addresses yourself for BTC, BCH, and LTC. For Ethereum based coins (USDT, ETH, and LINK), please contact support to have a wallet created. These wallets will expire after 90 days of inactivity, so only create wallets that you intend to use within that time.