You wouldn't go for your driver's license test before ever getting behind the wheel, right? In reality, you'd practice your three-point turns and parallel parking first so you're ready and know what to expect when the real test comes.
Just as you suspected, this scenario's an analogy for the PSAT. Rather than sitting for it junior year without a practice run, you can improve your performance if you've already taken it in 10th grade. Taking the PSAT as a sophomore is a great, low-pressure way to familiarize yourself with the test, gauge your level, and figure out where you need to improve.
With this in mind, we'll look at what PSAT scores are good for sophomores and how to improve them even more for junior year. But first, let's consider how the PSAT is scored.