Google core updates and other algorithm updates impacted Discover, but now Google says the helpful content system does as well.
Google has updated some of its search documentation to say now that the Google helpful content system can impact your site’s visibility not just in Google Search but also in Google Discover. This was a bit of a surprise to me because Google has not communicated this change up until now, and we have had a few helpful content updates since its first communication.
New communication. Google updated this document to say, “The system generates a site-wide signal that we consider among many other signals for use in Google Search (which includes Discover). The system automatically identifies content that seems to have little value, low-added value or is otherwise not particularly helpful to people.”