Metamask uses a default node provider to display and send transactions for your account If you'd like to switch this over to Alchemy to be able to see your transactions in your Alchemy dashboard and use Alchemy specific features and tools, integrate your Metamsk account in two steps. NOTE: This does not mean that Alchemy will have access to your private keys or wallet!
Make sure you use the correct Alchemy API URL for your desired network
Alchemy supported chains:
Ethereum Main Network (Mainnet)
Ropsten Test Network
Rinkeby Test Network
Goerli Test Network
Kovan Test Network
And thats it! Your Metamask is now hooked up to Alchemy 🎉 You've now unlocked game changing tools like the Mempool Visualizer (where you can view all your transactions as they are being mined), Alchemy Notify (receive notifications about address activity, dropped/mined transactions, etc.), and more!