For years, Google updates were named by the people who tracked them: Florida, Fred, Medic, Brackets. In March 2019 Google tried something different. After confirming a new broad core update, it gave the update an official, deliberately boring name: the "March 2019 Core Update".
That small decision has shaped how every core update since has been reported. It ended a week of confusion in which the same update was being called different things, including "Florida 2", and it set the month-year naming pattern Google still uses in 2026.
In this article you will learn what Google confirmed about the March 2019 core update, why it introduced the naming convention, what tracking tools and surveys reported, and what Google advised site owners to do.
Key Takeaways
- Google said the broad core update started on 12 March 2019 and confirmed it that week.
- On 15 March 2019 Google named it the "March 2019 Core Update", starting the month-year naming convention.
- Google said it was a noticeable update but far from the biggest it had ever done.
- Tools and surveys found no single obvious pattern by site type; some described it as partly reversing earlier changes.
- Google's advice repeated its 2018 guidance: there's nothing wrong with pages that now perform less well, and no quick fix.
The March 2019 core update at a glance
| Item | Details |
|---|---|
| Official name | March 2019 Core Update |
| Industry nickname | "Florida 2" (origin unclear; it circulated before Google named the update) |
| Start date | 12 March 2019, according to Google's Danny Sullivan as reported by Search Engine Land |
| Named by Google | 15 March 2019, via the Google SearchLiaison account |
| Type | Broad core update |
| Confirmed by Google? | Yes |
| Size | Google said it was noticeable but far from the biggest update it had done |
| Rollout end | Not stated in the sources we reviewed |
Why Google started naming core updates
When an update lands, SEOs need a shared label to discuss it. Before 2019, those labels came from forums and blogs, and the same update could end up with several names. In March 2019, "Florida 2" was circulating alongside other descriptions. Search Engine Journal notes that Pubcon's Brett Tabke had received advance notice of the update at the Pubcon Florida conference, which may explain the association, but the article does not confirm the name's origin.
Google stepped in with its own name. Search Engine Journal quotes the SearchLiaison account:
“We think this helps avoid confusion; it tells you the type of update it was and when it happened.”
— Google SearchLiaison, quoted by Search Engine Journal, Florida 2 update insights
The convention worked. The June 2019 core update and September 2019 core update followed the same format, and Google has used month-year names for core updates ever since. Our explainer on how Google updates get named covers the history in full.
What Google said about the update
Google confirmed the update and, according to Search Engine Land's review of 2019, described it as "a noticeable update that we felt warranted confirming", while adding that it was far from the biggest update Google had ever done. Google would not say more about what changed.
Its advice pointed back to earlier guidance. Search Engine Land's coverage quotes Google saying that its guidance remained as it had covered before, that there's nothing wrong with pages that may now perform less well, and that there is no "fix" other than to keep focusing on great content. That guidance was first given for the March 2018 core update.
Search Engine Land also reported that before Google confirmed the update, some commentators assumed it was aimed at health and medical sites, as many believed the August 2018 "Medic" update had been. Google had said that August update had no specific target in that space.
What tools and surveys reported
Here is what we could verify, with each source's limitations. None of these are Google figures.
| Source | Finding | Caveat |
|---|---|---|
| Search Engine Land survey (500+ respondents) | 58% reported a negative impact, 33% positive and 9% no change | Self-selected respondents; people who were hit are more likely to answer |
| Search Engine Land survey | No obvious pattern by site type or content | Survey-based |
| SEMrush (via Search Engine Journal) | Most affected categories: Autos & Vehicles, Health, Pets & Animals | Volatility data, not traffic |
| SEMrush (via Search Engine Journal) | Volatility not significantly higher than typical unannounced updates; Germany, France and Italy lagged by a day | Tool-specific measurement |
| WebmasterWorld members (via Search Engine Journal) | Some recoveries, including sites previously hit by older updates | Anecdotal forum reports |
| General commentary (via Search Engine Journal) | Many described the update as behaving like a rollback of earlier updates | Interpretation, not confirmed by Google |
The overall picture is of a broad, mixed update. The rollback theory was popular, but it was never confirmed, and "no obvious pattern" is a reasonable summary of the survey data.
How to analyse a core update like this one
- Mark the start date in your reporting and wait until the rollout has finished before drawing firm conclusions.
- Compare equal periods before and after in Search Console, filtering out branded queries where possible.
- Break changes down by page type and query group to see where the movement is concentrated.
- Check which pages gained for queries you lost and what they offer that yours do not.
- Review your most affected pages against Google's helpful content questions.
- Prioritise meaningful improvements and avoid sitewide "quick fixes".
- Keep monitoring through later updates, since changes may take time to be reflected.
Our guides to before-and-after core update comparisons and how Google rolls out core updates explain each step.
Common mistakes
- Reading too much into a nickname. "Florida 2" said nothing about the 2003 Florida update or what changed in 2019.
- Assuming a sector target. Early speculation about health sites was not confirmed by Google.
- Treating survey percentages as the whole web. Self-selected surveys over-represent sites that saw changes.
- Reacting mid-rollout. Rankings often keep shifting until a core update completes.
- Undoing past improvements. If you gained, it is rarely wise to reverse quality work because of short-term movement.
Where this update fits in the timeline
March 2019 was the first of three confirmed core updates that year, followed by June (the first pre-announced core update) and September. Together they defined the modern pattern: named, confirmed, roughly quarterly core updates with consistent guidance. See our Google core updates guide and the wider algorithm updates hub for context.
Related Guides
- Google's June 2019 Core Update: The First Pre-Announced Core Update
- Google's September 2019 Core Update Explained
- Google BERT Update (2019): How Language Understanding Changed Search
Frequently Asked Questions
When did the March 2019 core update start?
Google said it started on 12 March 2019. Google named it on 15 March 2019.
Why did Google name it the "March 2019 Core Update"?
Google said a name helps avoid confusion because it tells you the type of update and when it happened. Before then, the industry was calling it different names, including "Florida 2".
Was the March 2019 update a big one?
Google described it as a noticeable update that warranted confirming, but far from the biggest it had ever done.
Which sites were affected?
A Search Engine Land survey found no obvious pattern by site type. SEMrush data reported Autos & Vehicles, Health, and Pets & Animals as the most affected categories.
What did Google advise?
Google repeated its earlier guidance: there's nothing wrong with pages that may now perform less well, and no "fix" other than remaining focused on great content.
Conclusion
The March 2019 core update is remembered less for its impact than for its name. By labelling it plainly, Google gave site owners and SEOs a common reference point, and the same calm, content-first guidance applies to every core update since. If a core update has hit your traffic, start with our ranking drop recovery guide, or talk to our SEO team and request a quote.
