Google Releases Official Documentation on Preferred Sources for Publishers
TLDR
Google published official documentation explaining Preferred Sources and how publishers can encourage readers to subscribe.
Optimixed Overview
Optimixed's original report on this story.
Following its global rollout of Preferred Sources, Google has released help documentation to guide site owners in understanding and leveraging the feature to grow their subscriber base. SEOFOMO News reports the resource explains what Preferred Sources are and outlines strategies publishers can use to encourage readers to opt in.