How do I root?

Could someone please tell me, how do I root my Sony Xperia Z3+?

What do you planning on doing with root? Because if you are asking how to do this here, I'm worried you may mess up your device.

What firmware version are you on?

Honestly, you can just look at youtube videos on how to root. Personally, I had a z3 myself, but it was a real hassle to root the phone. Like, I had to go to this russian or italian website to get the proper firmware for my country