Miss U

Being more efficient with the description was the big takeaway, as putting less into the description was correlated with a much better rank across multiple data points:

The longer the app's description, the worse its rank was. It may be that efficiency leads to a better rank, or that the higher ranking apps simply chose to use fewer characters.

Furthermore, it seemed that apps which listed their features out (which can take up a lot of space) did not do too much better than those that did not bother.

Apps that used more contiguous lines in their opening before giving users some white space for breathing room also saw lower average ranks.