Why are grades and ranks different?
Grade and rank can (and for some analysis metrics often do) vary significantly. A URLs may receive a fair grade and yet rank poorly. This occurs when the URL is performing well in an absolute sense, yet because there are many other URLs performing even better, it’s relative ranking is significantly poorer. Since grades and ranks are fundamentally different measurements of “goodness” they often vary with the grade being better than the rank or the rank being better than the grade.
