Can someone provide more details on this announcement - Munchkin Change for Google PageRank Algorithm?

[Anonymous]

I saw this announcement, but would like more details on it. Specifically, what the update was and what was a the recent Google PageRank Algorithm update?

Thanks,

Shirleen

[Jenn_DiMaria2]

This probably isn't helpful at all, but I have to wonder if it has something to do with RankBrain?