'Connected Dapps' are Dapps (decentralized apps) you've given permission to interact with your Ready account. For these Dapps you're connecting via Starknetkit, standard for connecting 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if you want to invest in a liquidity pool through Vesu you'll need to authorize a certain amount of assets to be withdrawn. Vesu will appear in your list of Connected Dapps.
You can revoke a Dapps authorization at any time by going to Settings - Connected 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 Ready you can specify exactly what level of tokens the Dapp can access.