Grading is an important part of study sessions. Notes that are graded as wrong may be repeated in the current study session, and will be scheduled to be due more regularly in future.
To grade a note as correct, meaning that you remembered the note’s content, tap the bottom-right of the study session screen. To grade a note as incorrect (wrong), tap the bottom-left of the screen.
There is a default grade applied to any note that you don’t grade yourself. You can change this default in the Study Settings.