@markoxm7

.addres(1) --> (1) represent the index, its a pagelist type of property, it can have multiple index to store multiple values of the address like Addressline 1,Pin code etc

.cellphone --> these are single value properties , can just store phone number as name appears

.billingAddress --> these are single value properties / Single Page property , can just store entire address as name appears on single page

Hope this helps