What is meant when departure control instruct you to 'resume own navigation' after you have been vectored to an airway?

Question

Question ATPL - Airline Transport Pilot license - Air Law

QuizVDS · Accepted Answer

You should maintain that airway by use of your navigation equipment.

QuizVDS · Answer

Advisories will no longer be issued by AT

QuizVDS · Answer

Radar Service is terminated.

QuizVDS · Answer

Radar Service is terminated. You are still in radar contact, but must make position reports.

Id 375 - ATPL - What is meant when departure control instruct you to 'resume own navigation' after you have been vectored to an airway?