GoogleCore UpdateConfirmedHigh impact
November 2021 core update
Core update released two weeks before the holiday peak, completing on 30 November after a fast, volatile start.
What changed
Google began the November 2021 core update on 17 November and confirmed completion on 30 November. Data providers recorded a very sharp initial spike in volatility, and the timing before Black Friday again drew criticism from retailers. Google issued no new guidance beyond its standard core update advice.
Timing
Rollout began 17 November 2021. Google declared it complete on 30 November 2021, 13 days later. Rankings typically remain unstable for the whole rollout window, so measurements taken inside it are not a reliable read on the outcome.