What do they Mean by address Line 1 and Address Line 2

 1. what does Address Line 1 mean?                                                                                Address line 1 is the section containing the primary address and secondary address information. Usually, address line 1 includes street address and the building/apartment number, for example., 224 A Gulf Course Road, Tabuk                                                                                                                                                                                                                                                          2. What does the Address line 2 section contain?                                                                                                                            Address line 2 section is where you need to write or add your building/society or apartment's name, suite, or other address information. Predominantly, the users do not prefer to fill this form filed as they think it is not necessary checkout. Furthermore, this field is optional.