I’ve always known that I don’t literally know everything. No one does. I do tend to say that “I’m always right.” But that’s really because I very rarely make an argument that I am not sure of. I wish more people would do this, but that’s not my point here.
My point is, that I don’t know everything. I often know more than I think I do, but in this case, regarding SEO, I know next to nothing. Since this is something I ought to know something about, I’ve taken some steps to learn more.