If you do not change it, you stand at a risk of letting this information be seen by anyone who is in your local Ethernet network easily with the help of some simple tools. The first and foremost reason anyone would want to change is privacy. Why would anyone want to change the MAC Address? In simple words, the MAC address is used by people so that they can identify their android phones on the internet or any local network easily.
The Media Access Control or the MAC address is referred to as the 12-character unique identifying number which is specifically assigned to a piece of a hardware device such as the adapter of a WiFi device.
