Once the Progressive Taxi Instructions are no longer required, the controller must send ‘Continue Taxi at your discretion’.
I see it too often for it not to be addressed. It’s important that you never forget to send this command. The controller must send this because it is assumed that the pilot will need to continue to follow the direction given previously.
It leaves a little bit of doubt for the pilot as to what the next step will be. “What will I need to do next?” Right after that final progressive taxi instruction, send it and be done so you don’t forget.
References: 5.2.2 of the ATC Manual