Compared to the other devices, unlocking bootloader on Nexus is easy as 123. You don’t have to go through lots of steps like visiting official website, registering account, looking for the unlock code in your email and so on.
All you have to do is to follow those simple steps given below.
Warning: Unlocking bootloader voids devices warranty. Proceed at your own risk.
During the unlock process, device internal storage will be erased. It’s strongly recommended to back up all data before getting started.