March 2023 Google Core Update: Winners, Losers, and Limits

Updated November 2026.

The Google Search Status Dashboard records the rollout dates. A ranking chart that moved during those two weeks is a starting point for investigation, not proof that the update caused the movement. Demand, seasonality, site changes, competitors, and other search systems can all affect the same chart.

Who won and lost?

Google’s rollout notice contains no domain-level winner and loser list. Third-party visibility tools can show changes in their sampled keywords, but those estimates do not reveal a site’s traffic, sales, or why its rankings changed. A list built from those tools can be useful for finding examples; it cannot establish that Google rewarded or penalized a particular company.

For your own site, define a “winner” as a page or query group with a sustained increase in relevant organic clicks or impressions after the rollout. Define a “loser” the same way in reverse. Check whether the movement is concentrated on certain topics, devices, countries, or search appearances. A sitewide average can hide a few large changes.

For a concrete snapshot, SISTRIX measured Google UK visibility between March 16 and March 20, 2023. In its tracked keyword set, next.co.uk rose from a Visibility Index of 162.61 to 191.06, while wiktionary.org fell from 534.82 to 461.18. These are early changes in sampled search visibility, not verified traffic or revenue, and the comparison ended before Google finished rolling out the update. Read the original SISTRIX analysis and tables.

How to investigate a March 2023 change

1. In Search Console, choose a week before March 15 and a comparable week at least one week after March 28. Google recommends allowing time for the rollout to settle.
2. Compare clicks and impressions by page, query, country, device, and search type. Look for sustained patterns, not one-day swings.
3. Check whether the page changed, became inaccessible, lost internal links, or faced a new competitor or search result layout.
4. Read the pages that declined. Do they answer the query directly, show the information a reader needs, and make their sources and limitations clear?

Those steps follow Google’s core update guidance. Google also says a drop after a core update does not necessarily mean a page has done something wrong; it does not offer a single technical fix that reverses every decline.

The uncomfortable conclusion about update analysis

“Recovery” advice often starts with a confident diagnosis that the available data cannot support. If a page lost impressions because fewer people searched for the topic, rewriting it for “quality” will miss the problem. If it lost clicks while impressions held steady, inspect position and the search result itself. If both fell on one URL but similar pages gained, examine overlap and intent before changing the whole site.

Use the March 2023 dates as an analytical boundary. Then let page-level evidence determine the work. That is more useful than declaring every upward domain a winner or every downward domain a loser.