Google's SEO weather is stormy today. SERP volatility is running at 7.9/10 according to WireBoard's tracker, with several providers showing extreme movement, which points to a real ranking shake-up even though Google has not announced a new broad update today.
Across Search Engine Roundtable, Search Engine Land, Search Engine Journal, and Google Search Central, the clearest picture is this: lots of ranking movement, but no fresh official Google rollout notice on March 13, 2026. Search Central's most recent documented change was on March 12, when Google clarified page experience and Core Web Vitals wording, including that INP is now a Core Web Vital. That is guidance, not an algorithm launch.
What site owners should do: do not panic-edit pages today. Check Search Console, compare traffic by page type, and look for patterns. If losses are concentrated on slow, weak, or thin pages, improve those first. If rankings rebound over the next few days, this may be turbulence, not damage.