The student learned several important improvements from their preliminary task to the full product. In the preliminary task, they only knew basic shots and had no screenplay or proper dialogues. This led to difficulties like the actors not knowing what to say and loud background noise obscuring dialogues. For the full product, the student did extensive research like making a storyboard and shot list. They also upgraded their camera equipment and used a microphone to improve audio quality. By implementing depth of field and having a screenplay, the dialogues were clearer and the actors knew their lines, representing significant improvements over the preliminary task.