Rereading a textbook and highlighting notes feels productive, but it is one of the weakest ways to learn. The information looks familiar, so you assume you know it, and then you blank on the exam. Self-testing breaks that illusion. When you try to answer a question from memory and get it wrong, you find out what you do not actually know while there is still time to fix it.
It uses active recall, the method the research backs. Retrieval practice, the act of pulling an answer from memory, consistently beats passive review in studies of how people learn. Every question you answer strengthens the memory and makes it easier to retrieve next time. Pair that with spacing your quizzes over several days, and you get durable learning instead of a cram that fades by the weekend. The active recall study tool is built around exactly this idea.
It matches your actual course. Because the questions come from your own notes and readings, you practice what your professor emphasized, not a generic syllabus. There is no gap between what you studied and what shows up on the quiz, which makes every minute of practice count toward the grade you care about.
It saves the time you would spend writing questions. Making your own practice test by hand means rereading everything and inventing questions, which most students never get around to. Uploading your material and generating a quiz in under a minute removes that barrier, so the hard part of studying is doing the practice, not building it. When you want to memorize terms and definitions, turn the same material into flashcards from your PDF, or compress it first with the study guide generator.