Zn 2p describes one of the core levels of the zinc atom, corresponding to a 2p orbital. There are others, like the 2s, 3s, 3p, 3d etc.

There is no such thing as a 2d orbital.

Due to spin orbit coupling, the 2p core level splits up into 2 levels with different binding energies, reffered to as 2p1/2 and 2p3/2.

For zinc the 2p core level is often used, because it has the highest cross section and therefore yields the strongest signal.

Thank you Thorsten Schultz

I agree with Thorsten Schultz

Actually, for every element (except H, He) there are specific B.E. values that give the indication for the presence of that element. Sometimes these core level spectra can overlap with other material, in this case, you can check for the auger peak for the expected material and confirm the same.