MetaMask*Extension | move your tokens

MetaMask Portfolio does exactly what it says on the tin: it pulls together bridging quotes for you to choose from. From here, you can pick the best quote for you and move your tokens to the network

MetaMask*Extension | move your tokens

What is a bridge?

A bridge allows you to transfer your tokens between different blockchain networks. For example, perhaps you want to use a dapp or a game on the Polygon network, but most of your funds are on Ethereum mainnet. You can use a bridge to transfer some ETH, USDC, or other tokens from Ethereum to Polygon — retaining their value — and start to use them with dapps on Polygon.

To dive a bit deeper:

At their most basic level, bridges are platforms with contracts on the chains you're transferring to and from. Though the exact system varies, each bridge has a mechanism to validate your deposit on one network and issue equivalent tokens on another network.

When you request to move Ethereum from Mainnet to Polygon, for example, the first thing the bridge will need to do is have you deposit the ETH to the bridge. The bridge will prompt you to sign a transaction to send the tokens to their address (for tokens other than ETH, this assumes you've already signed an approval granting it access to your tokens).