Checking their work against a professional solution.
Learning a specific technique they may have missed during a lecture.
However, the primary criticism of GDZ is that it often becomes a shortcut rather than a tool. When students bypass the struggle of solving a problem and simply transcribe the answer, they lose the "cognitive friction" required for long-term memory and skill acquisition. This leads to a false sense of confidence that collapses during exams when the "answer key" is no longer available. Striking a Balance