What is a state? Phaser State sample structure

sampleState.js

// Create one state called 'sampleState'
var sampleState = {
	// Define all the functions of the state
	preload: function() {
		// This function will be executed at the beginning
		// That's where we load the game's assets
	},
	create: function() {
		// This function is called after the preload function
		// Here we set up the game, display sprites, etc.
	},
	update: function() {
		// This function is called 60 times per second
		// It contains the game's logic
	},
	
	// And maybe add some other functions
};