Approval voting means that people can put their weight behind multiple options. Approval is good to rank a set of options (our main usecase would be prioritisation eg.)

>>LFW: It's mainly useful when we want to rank a set of options in order of priority. Ironically ranked choice isn't great for that. Because it moves the vote weight around to find the best option. Ranked choice is good to choose a single option from a set of valid options.