e39 com huong toi viec hoan thien chat luong dich vu thong qua giao dien truc quan, he thong danh muc de tim va quy trinh thao tac ro rang. Nguoi dung co the chu dong kham pha noi dung, tim hieu cac tinh nang va tiep can thong tin ho tro khi can. Su thuan tien trong thiet ke la yeu to gop phan tao nen trai nghiem nhat quan.