MAC Address on iPhone often refers to identify unique Wi-Fi network. The full form of MAC is Media Access Control address. Each device does have an unique number which will be also for Android devices. Where the iPhone address may found in 2 areas in your device.
This Mac address may built in for every network card which might be an Wi-Fi card or ethernet Card. Once a address assigned to a device, that may not changed and cannot removed again.
This address used for LAN connected devices to identify the device with its proper naming. As well every two devices don’t have identical Mac addresses, as if you have a similar address they will not able to communicate properly.