Okay kiddo! So you know how in Spain there are different areas that have their own government and laws? They are called "autonomous communities".
Now, people like to make lists of these communities in order from most important to least important. This is called a "ranked list". It's kind of like making a list of your favorite ice cream flavors from best to worst.
But why do people make these lists, you may ask? Well, it helps them see which communities are doing the best, and which ones might need some extra help. For example, if a certain community keeps ending up at the bottom of the list, it might mean they need more resources to improve.
So there you have it, a ranked list of spanish autonomous communities is just a list of these different areas put in order from most successful to least successful!