i mean standard outlets have live neutral and ground, neutral and ground are ultimately both connected to the true ground in the earth, but neutral is the ground the current optimally flows through, whereas ground is just used for safety to prevent metal casings of devices from silently being connected to live or whatever. dont know how much of that applies to ev chargers but probably not too far off.
generally, it separates core functions of your phone from google, and lets you decide how much data to share with google via permissions (can be none, can be like stock android), just like any other app.
they also put lots of work into hardening the os against attacks such as the ones used by police and spyware companies to unlock phones, and are basically the only phone configuration consistently safe against those companies.
the day to day experience is pretty much the same as stock android, as long as you install google services. main issues with it (I have heard, I haven't ran into these on my install) are some banking apps, and google pay doesn't work.
its from terry davis, the schizophrenic talented developer who wrote his own OS (TempleOS) from scratch as one of gods temples or something, however he was pretty racist and delusional, so would see "glowies" of CIA agents or whatever trying to get him, and now the term is used for people suspecting others of being federal agents
it is just sad, really wish we understood the brain more and could help those who need it