A Test Protocol is just a set of instructions for administering a test. When you make a test, you might want to specify environmental conditions, or maybe give instructions about some equipment used for the test.
One Test Protocol can be assigned for more than one test, but each test can only have one protocol.
To write a new Test Protocol, there are 2 ways to do this.
One way is to click "Share" from your left navigation menu and select "Test Protocol":
Another way you can add a new Test Protocol is by clicking the Track Performance button from the left navigation menu and then clicking the "Add New Protocol" button at the bottom of the page:
You can edit any existing test protocol by clicking the name of the protocol too!
A third way to access the existing Test Protocols as a Coach or Director is to navigate to your athlete's profile page, locate their Performance panel and click the "More details" link on the bottom right and then clicking the "Add" button in the detailed Performance page: