Okay kiddo, do you know what a house is? It's a building where people live, and they use it to sleep, eat, and do all sorts of things. But sometimes, houses can be really expensive and some people might not be able to afford one.
That's where the housing affordability index comes in. It's a way for people to figure out if they can afford a house or not. It looks at a lot of different things, like how much money people make and how much they need to spend on other things, like food and clothes.
Basically, the housing affordability index takes a bunch of information and puts it all together to see if someone can afford a house. If the index says that they can, it means that they can afford to pay for a house without having too much trouble. But if the index says they can't, it means that they might need to save up some more money or look for a cheaper house.
So, the housing affordability index is really important for anyone who wants to buy a house. It helps them figure out how much money they need to have and how much they can afford to spend on a house.