Trezor Bridge is a lightweight software that enables direct communication between your Trezor hardware wallet and your web browser. If you're using a Trezor wallet (such as the Trezor Model One or Trezor Model T) to manage your digital assets, Trezor Bridge acts as a crucial link, enabling the wallet to interface with various cryptocurrency platforms and services online. Without Trezor Bridge, your computer would not be able to interact with the wallet effectively.