Can the use of summarized notes lead to better acdemic performance?

Question

You can use summaries for idle time review which means you will spend more time studying than if you didn't have a summary e.g. between classes, just before you go to bed.
You can use summaries for last minute review just before exams

Answer 1

I think you've answered the question yourself here.
And yes,summarized notes mean that you are not repeatedly wading through what is irrelevant or superfluous but concentrating on salient facts