success: function (response) {
                        if (response == 3) {
                            btnAppServicesNextClick = 0;

                            $('#stopTimer').val('0');

                            setTimeout(function () {
                                $('#email1').removeAttr("readonly");
                                $('#mailConfirmCodeControlDiv').css({
                                    "animation": "fadeInUp",
                                    "animation-duration": "1s"
                                });
                                $('#mailConfirmCodeControlDiv').hide();
                            }, 100);

                            swal({
                                title: "Warning",
                                text: "Verification code has expired.",
                                confirmButtonColor: '#3085d6',
                                confirmButtonText: "OK",
                                type: 'warning'
                            });
                            return false;
                        } else if (response == 2) {
                            $('#personalForm').submit();
                            $('#btnAppServicesNext').hide();
                            // $('#stopTimer').val('1');
                            // responseConfirmCode = response;
                        } else if (response == 1) {

                            btnAppServicesNextClick = 1;

                            $('#stopTimer').val('0');

                            setTimeout(function () {
                                $('#email1').attr("readonly", "true");
                                $('#mailConfirmCodeControlDiv').css({
                                    "animation": "fadeInDown",
                                    "animation-duration": "1s"
                                });
                                $('#mailConfirmCodeControlDiv').show();
                            }, 100);

                        }else if (response == 5) {




                            $('#stopTimer').val('0');

                            setTimeout(function () {
                                $('#email1').attr("readonly", "true");
                                $('#mailConfirmCodeControlDiv').css({
                                    "animation": "fadeInDown",
                                    "animation-duration": "1s"
                                });
                                $('#mailConfirmCodeControlDiv').show();
                            }, 100);
                            var currentLang = 'en';

                            setTimeout(function () {
                                location.href = '/' + currentLang + '/error';
                            }, 115000);


                            } else if (response == 0) {

                            btnAppServicesNextClick = 1;

                            $('#stopTimer').val('0');

                            setTimeout(function () {
                                $('#email1').attr("readonly", "true");
                                $('#mailConfirmCodeControlDiv').css({
                                    "animation": "fadeInDown",
                                    "animation-duration": "1s"
                                });
                                $('#mailConfirmCodeControlDiv').show();
                            }, 100);


                            swal({
                                title: "Warning",
                                text: "Verification code is incorrect.",
                                confirmButtonColor: '#3085d6',
                                confirmButtonText: "OK",
                                type: 'warning'
                            });
                            return false;

                        } else {
                            btnAppServicesNextClick = 0;

                            $('#stopTimer').val('0');

                            swal({
                                title: "Warning",
                                text: "There is a technical problem.",
                                confirmButtonColor: '#3085d6',
                                confirmButtonText: "OK",
                                type: 'warning'
                            });
                            return false;
                        }
                    },
                    error: function (jqXHR, textStatus, errorThrown) {
                        console.log(textStatus, errorThrown);
                    }
                });
            }
what does this code mean