I was exploring some data this evening and came across the score and percent_rank fields in the topics table. But it wasn’t immediately obvious to me what these fields are, how they are calculated and what they are used for. I can spelunk through the source code if necessary, but I thought I’d ask if anyone has the TL;DR; on that info close at hand first.
AFAIK, those have to do with the Top page and the summary emails.
Factors include, Likes, views, activity etc.