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Is there any news yet as to what the December 2020 core update focused on? What types of sites were the biggest winners vs biggest losers?

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Short answer for : Google confirmed a global, broad “December 2020 Core Update” that began rolling out on December 3, 2020 and was marked complete around December 16, 2020. Google treated this like other broad core updates (no single targeted penalty) and pointed site owners back to its usual guidance about reassessing content quality and E-A-T. (status.search.google.com)

What the data showed: no single industry was uniformly targeted, but data providers recorded a big reshuffle. SISTRIX documented heavy visibility losses for many dictionary/encyclopedia-style sites and large drops for some major retail domains (Amazon showed notable visibility declines in several countries), while social platforms and certain publisher/health pages gained visibility. Results varied by country, query, and page — this was a redistribution of visibility, not a single-signal change. See SISTRIX’s writeup for domain-level examples. (sistrix.com)

What Google said you should do: core updates reassess how systems value content; there’s rarely a single “fix.” Google’s public guidance is to self-audit using their quality questions (originality, depth, sourcing, authoritativeness, clarity) and improve content where it is weak. Meaningful improvements may only be reflected after future broad updates as systems reassess pages. (developers.google.com)

Practical checklist (fast triage)

  • Use Search Console (Performance) + analytics to compare before/after date ranges and list the pages and queries that dropped.
  • For top-drop pages, compare search intent and the competitor pages that gained: depth, first-hand evidence, author credentials, citations.
  • Fix obvious technical/indexing and page-experience issues, then consolidate or remove thin/duplicate content.
  • Document changes and monitor; recovery usually depends on long-term quality improvements and later algorithm reassessments. (developers.google.com)

Further reading: Google’s core-update guidance and the SISTRIX December analysis linked above provide solid next steps.

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