A 2-way switch has two terminals and gives a closed (on) or open circuit.
A 3-way switch has three terminals and gives you one terminal tied to either, but not both of the other two.
A 4-way switch has four termimals and gives you two terminals which are each tied to the other two terminals and you can pick; these also give you a big headache when one switch of many fails and one circuit path is open, but many paths still work.
2 way: SPST
3 way: SPDT
4 way: DPDT
I once lived in a house with a 5(!) gang box with three of the switches wired to the upstairs hall light incorrectly and another switch upstairs. It was as big a mess as you'd imagine.
These are available in "smart"/connected form or regular electronics-only form. Example here:
https://www.amazon.com/Lutron-Incandescent-Single-Pole-Multi...
I agree with you and much prefer them to the traditional switches.
Completely arbitrary on a two way (wait, they're called three way?) switches.