Tests and quizzes are really useful study techniques, which can improve how quickly you learn.
When you do an exam, you have to recall and apply what you have learnt. This process greatly improves your chances of remembering information. It also makes future study sessions more productive, by showing what you need to work on next.
In addition, by taking exams, you can improve your ability to apply what you’ve learned in new contexts.
In particular, open-ended assessments (such as essay writing) help our brains to organize information, which produces ‘deeper learning’ – so you can retrieve that knowledge flexibly and transfer it to other situations.