Be prepared to inform your supervisor about it. It may be helpful to keep a list of your assignments or projects and what has been accomplished. Have that information with you when you meet with your supervisor and plan regular meetings. You do not want to just hand the supervisor a written report, but have it with you as a backup to your conversation. To advance in a company, it is often necessary to tell people how you are doing a good job.
Demonstrative evidence works.
It is not enough in many companies just to do a good job and hope that someone notices or appreciates it. Look around you for problem areas that need attention. It may be in your particular department or elsewhere in the company. Obviously, you do not want to tell someone else how to do their job but virtually all companies welcome employee suggestions. If you can come up with a solution to a profit-draining problem or provide some assistance in an emergency situation, you may quickly win the approval of senior management.