What happened and what you should know now
Google released the May (Year) Core Update yesterday, May 21st, and will begin rolling out at 8:40 a.m. Pacific Time. The update may take up to two weeks to fully complete, meaning rankings will continue to shift until around June 4th. This is the second major core update of (year), following the March update that moved nearly 80% of the top three spots. If your rankings or traffic numbers have fluctuated wildly since yesterday, you can’t imagine it. The update is now live and active.
What sets this update apart from previous updates is the engine underneath. The May (year) Core Update is based on Gemini-based quality models – the same AI infrastructure that Google unveiled at I/O this week. Google now powers its core ranking systems using advanced AI rather than the traditional signal weighting models that have defined search over the last decade. According to an early SEO community analysis, the focus is consistent with the direction of the March update: highlighting original, helpful, people-oriented content and penalizing automated, ad-laden content. But with Gemini’s multimodal understanding built into its quality assessment, the signals Google can read are significantly more sophisticated than before.
What you should do now – and what you shouldn’t do
The most important thing not to do is make sudden content changes due to early ranking moves. Google’s own recommendation is to wait until the introduction is complete before drawing conclusions. Rankings during a two-week rollout are not stable – a decline recorded on May 22 may not be the final result. You should review Search Console data no earlier than around June 4th and make strategic decisions after the update is fully rolled out.
In the meantime, check your highest-traffic pages for the signals this update rewards: true expert authorship, original data, first-hand experience on the topic, and editorial transparency. Local service businesses – dental offices, law firms, nursing services – should ensure their Google business profile is complete and their service pages are locally specific and genuinely helpful. If your site was already affected by the March (annual) update and has not yet recovered, the May update is the next reasonable opportunity to recover – but only if the underlying quality improvements were made between April and now. The next core update won’t help a site that hasn’t made any significant changes since the last one.
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