You got me. I just keep writing, hone my craft as I can, and try not to worry about it too much.
I did take a look at your profile to see if anything jumped out at me--since I'm guessing the question behind your question may be, "How do I drive my score up and keep it there?" And one thing did jump out at me.
A significant number of your Hubs are compilations of material published elsewhere on the Internet: Funny sayings, quotations, Facebook posts, etc. HubPages (and the search engines) all tend to reward content that is 100% original...which by definition a compilation cannot be.
If you could begin producing more of your own material, that might help.