I have just noticed there looks to be a yellow tab to peel off on top of the camera.
Does this stay in place or should I peel it off.

I kept mine on

I removed mine.

There are a series of yellow tabs on the drone when you first unpack it, all of them can be removed.

Remove it or not , it's your choice
(Doesn't really matter much)

I got a red tab on my Platinum - if you peel it off be very careful that you don't put any pressure on the gimbal whilst you are doing it as it is almost sealed down and difficult to remove. I did remove mine as I didn't want the lip of the tab to get caught on anything but I don't think it actually matters if you keep it on or not TBH.

Peeled mine.            

I noticed the yellow tab on top of the gimbal on my Mavic Pro Platinum as well. It seemed in an odd location and I can't quite figure out why it was there. I removed it. Then thought, mmmmmmmmmmmmm, maybe I should have left it on... Regardless, I haven't noticed any issues with it removed.

someone said it is to stop it getting scratched when it rubs on the drone, don't think it matters either way

Thanks for the advice.
Mines really well stuck on so I will leave ti for now.