'Authorized Dapps' are Dapps (decentralized apps) you've given permission to interact with your Argent wallet. For these Dapps you're connecting via Wallet Connect, a standard for connecting mobile wallets to desktop Dapps.
When you authorize a Dapp you give it permission to access your wallet and withdraw an amount of assets up to a limit you've chosen.
For example, if you want to enter a Pool Together prize draw you'll need to authorize a certain amount of assets to be withdrawn. PoolTogether will appear in your list of Authorized Dapps.
You can revoke a Dapps authorization at any time by going to Security - Authorized Dapps and following the on screen instructions. You will need to pay the network fee for this action as it is on an-chain transaction.
We've designed our integration to be much safer than traditional wallet-Dapp interactions as with Argent you can specify exactly what level of tokens the Dapp can access.