It simply means that it has been built for the ARM processor (as opposed to intel, which all previous Mac apps were built for) and therefore does not need to ru

It simply means that it has been built for the ARM processor (as opposed to intel, which all previous Mac apps were built for) and therefore does not need to run in the Rosetta emulation layer. Practically speaking most users probably won’t notice a difference. Apple silicon native apps might be a bit faster and use less battery than their intel counterparts.