Once you have created a test and captured traces to it, you can start annotating the captured traces. Go to the Annotations tab and use the scale you picked while creating the test to annotate the test. The chart at the top will show you how the scores are trending over time.
Once annotated or while annotating, you can add the traces to a dataset. This will allow you to run evaluations on the dataset and get insights into the performance of your application. To add traces to a dataset, click on the checkbox button on the first column of each row and click on the Add to Dataset button.