Creating your own cards is vital for understanding the topic you would like learn. Going through all your material while separating the important facts from the clutter is guaranteed to help you to get a thorough overview of the topic. You will be forced to think about your methods of organizing knowledge which makes writing cards and filtering out the clutter worth your time and effort.
45% Relevant facts for your exam
55% Simple text and prior knowledge
Writing your own cards is essential to your learning experience