• Navigator.pushReplacement: This replaces the current screen with a new one. The new screen comes in place of the existing screen, and the current screen is removed from the stack.

  Navigator.pushAndRemoveUntil: This removes all the previous screens in the stack until a certain condition is met. For example, you can remove all the screens and navigate to the new screen, ensuring the previous context is completely removed.

For example, if you're on a login screen and navigate to the home screen using pushReplacement, the login screen will be replaced by the home screen. But if you use pushAndRemoveUntil, you can remove all previous screens and directly navigate to the home screen, like clearing the stack and starting fresh.