the my results tool allows you to review all your completed tests. You are able to see the particular responses you made to each Rx in the test, re-view the actual Rx and view a summary of your errors over all tests to help you focus on areas of weakness.
For each test you have taken you will be presented with a table similar to the image below, containing details relating to each Rx in the test and how you responded:
An errors summary is shown to the side or below the tables detailing your test responses. The summary lists each error you have either missed or incorrectly assigned to a script and indicates how many times you have missed that error as a bar chart.
You can use this as an indication of your weaker areas to help focus your study.