it clicks a relay. Just like with ICE vehicles people usually use it to warm up their car in the winter.

Also, batteries may need to be preconditioned if too hot or cold. A lot of EVs let you set your ideal departure time in a widget as opposed to using a remote though.

This is a 4xe. It is a gas jeep with an overpriced, undersized battery and motor bolted on.

It can be started just like all the other gas cars.

Although even with full EVs, there's a reasonable concept of a "start". Some even let you essentially unlock and allow driving remotely, even if the local driver doesn't have a key. That's useful sometimes.

Pre-warm the battery, pre-heat or cool the interior, enable the defrosters.

Turn on the temperature control system?