This tag should be used when the behaviour of macOS using this family of processors could differ from other processor families, currently the main differentiator is with process from Intel x86 family.

Currently the main processor is the M1 with also M1 Pro and M1 Max versions. These all include an integrated GPU.

Wikipedia says

As of late 2021, Apple is switching Mac computers from Intel processors to Apple silicon. This plan was announced at WWDC 2020 on June 22, 2020;[1][2] the first Macs built around the Apple M1 processor were unveiled on November 10, 2020.