What is the Best Way to Use/See Improvements on GMATClub Tests

One thing i would like to mention and bring up right away is that you don't want to jump into the questions until you have actually have covered a certain topic (e.g. don't try to solve a bunch of geometry questions unitl you know the material). This will help you to focus on applying the concepts and "twsting" them to test your quick thinking and behavior on the test and expand your anticipation.

As to how you do it, you can either take target practice (e.g. you covered arithmetic - you go and take 10-50 questions in arithmetic) or take the full test. Keep in mind that the pool is shared so if you exhaust all Arithmetic questions, you won't be able to take any tests...

Good luck!