I would not relive Google's May 2023 core update like SEO archaeology. Core updates redistribute trust. The lesson is familiar: sites with clear expertise and useful pages tend to survive better than sites with scale and slop.
What to check after any core update
Which sections gained or lost: blog, product, local, tools.
Template changes across losers.
Overlap with thin or outdated content.
May 2023 reminders
Helpful content messaging was loud then.
Sites that looked mass-produced struggled.
Strong brands and clear service pages held better.
Your action list today
Refresh top losers with real proof.
Merge overlapping posts.
Improve internal links to money pages.
Stop publishing until fixes ship if you are bleeding.
Core updates are Google regrading the class. You pass by making pages you'd show a paying customer, not by tweeting about the update.