I love the idea but it is of limited use to me right now: How do I know this metric is any good? What does “attractiveness” mean and what desired outcomes doe

I love the idea but it is of limited use to me right now: How do I know this metric is any good? What does “attractiveness” mean and what desired outcomes does it correlate to? For example HN is ugly (sorry for the candor!) but it’s a plus - it’s a statement about what you write being most important and also by not changing the ui it’s lovely to use. Now compare that to Reddit which might come though as a prettier site at first glance but bitching about the Reddit ui and then someone mentioning old.reddit and friends is a trope: lots of people hate the Reddit ui. So on some metric that matters to me HN wins. Finally - if I score X how do I actually improve the score?