Have you ever checked your website's Google rankings, only to find that some pages have climbed while others have slipped? It can be frustrating and puzzling, especially when you haven't changed a thing.
The culprit might not be your website. Google could have changed the way it evaluates search results.
Google continually updates its search systems to deliver more relevant, helpful and reliable information. Some changes are small and barely noticeable. Others can cause significant ranking fluctuations across entire industries.
For businesses investing in search engine optimisation in Adelaide, getting a peek behind the curtain and understanding these changes helps explain why SEO isn't a one-off exercise. It’s an ongoing process that benefits from regular monitoring, considered analysis and improvements where evidence shows they are needed.
What are Google Algorithm Updates?
Google uses a complex set of automated systems to assess billions of web pages and determine which results best match a search query. These systems consider numerous signals, including relevance, content quality, links, freshness and the context of the search.
Google regularly refines these systems as information changes, technology advances and people develop new search habits. Some changes are announced as official updates. Others happen continuously in the background. Either way, the results can shift, even when your website has not changed.
Importantly, a ranking drop doesn't automatically mean you've done something wrong. Sometimes, Google has simply reassessed the available information and decided that different pages deserve greater visibility.
"Google continually updates its search systems to deliver more relevant, helpful and reliable information."
Main Types of Google Updates
Not all updates do the same job. Understanding the main categories makes it easier to interpret ranking changes. These categories can overlap. For example, Google may release a core update specifically for Discover, and Discover also uses many of the same signals and systems as Google Search.
Core updates are broad changes to Google's main ranking systems. They aim to improve the overall quality and relevance of search results rather than targeting a particular website or specific SEO tactic. Google might reassess how well pages satisfy search intent, how useful their content is, or how reliably they answer a query. As a result, one website might gain visibility while another loses ground.
Core updates can have a substantial impact across multiple industries. A page that previously ranked well isn't guaranteed to keep its position if Google's systems begin favouring other results.
Spam updates improve Google's ability to identify and limit websites that violate its spam policies. These include tactics such as manipulative link building, keyword stuffing, cloaking and scaled content abuse. Google continually adapts its spam detection systems to keep pace with new techniques. A spam update can therefore affect websites that rely on practices designed to manipulate rankings rather than genuinely help users.
For businesses and SEO companies following sound SEO principles, these updates reinforce the importance of building visibility through legitimate, sustainable practices.
Google Discover recommends content to users without requiring them to enter a search query. Its ranking systems consider factors such as a user's interests and the relevance of available content. Discover updates can change which articles appear in people's personalised feeds. While these changes can affect website traffic, they don't necessarily indicate a corresponding change in traditional Google Search rankings.
This distinction matters when analysing performance. Not every Google visibility change originates in the same search system.
Google also uses a review system designed to reward in-depth reviews that provide original research and insightful analysis from people who know the subject well. It can assess standalone reviews of products, services, businesses and other subjects, rather than customer reviews posted in a product or service page’s reviews section.
Helpful content is another important consideration. Although Google previously announced dedicated Helpful Content Updates, the helpful content system was incorporated into its core ranking systems in March 2024.
This means content quality isn't something businesses should address only when a named update appears. It remains part of the broader process Google uses to evaluate search results.
Beyond named updates, Google continually refines its ranking systems and the way it understands information. These improvements can influence how it interprets language, search intent, links, freshness and page relevance.
Changes to crawling, indexing and the presentation of search results can also affect visibility or traffic without necessarily representing a ranking algorithm update.
Google doesn't announce every adjustment. In fact, many smaller core improvements happen continuously, which means ranking changes can occur without an obvious explanation.
Major Google Updates of 2026 (so far)
Google’s official Search Status Dashboard records the following confirmed ranking updates for 2026, as of 15 October 2026. Dates below follow Google’s dashboard reporting in US/Pacific time.
February Discover Core Update: 5–27 February
Google introduced a core update for Discover, initially rolling it out to English-language users in the United States. The rollout ran from 5 to 27 February, lasting approximately 22 days. Google said it would expand the update to other countries and languages over time. Unlike a broad Search core update, this release specifically targeted content recommendations in Discover.
March Spam Update: 24–25 March
This global spam update covered all languages and regions. It completed in less than a day, demonstrating how quickly Google can roll out changes to its spam detection systems.
March Core Update: 27 March–8 April
Google's first broad core update of 2026 ran for approximately 12 days. Google described it as a regular update intended to better surface relevant, satisfying content from websites of all types.
May Core Update: 21 May–2 June
The second broad core update of the year ran for almost 12 days. As with other core updates, its significance lies in the potential reassessment of rankings across many topics and industries, rather than a single targeted SEO factor.
June Spam Update: 24–26 June
This global update applied across all languages and regions. It completed in just over two days, reinforcing Google's ongoing efforts to address manipulative search practices.
August Spam Update: 18–21 August
Another global spam update followed, taking approximately three days to roll out. Businesses using questionable SEO tactics may be particularly vulnerable to changes in how Google detects spam.
September Spam Update: 24 September–8 October
The latest confirmed update on the dashboard as of 15 October was a global spam update. Its rollout lasted almost 14 days, considerably longer than the August and June spam updates.
These dates come from Google's official Search Status Dashboard. They represent confirmed updates, not every adjustment Google makes behind the scenes.
What does this mean for your Website?
Ranking volatility is a normal part of organic search. A movement of a few positions doesn't necessarily indicate a problem, and reacting too quickly can lead to unnecessary changes to the website. So don’t panic! The key is understanding what's happening before figuring out what to do.
If rankings decline during a core update, first confirm that the rollout has finished. Google recommends waiting at least a full week after completion before analysing performance in Search Console, then comparing that period with a comparable period before the update began. An SEO expert can examine affected pages and queries, review search intent, and assess whether the decline reflects page-specific issues or broader weaknesses across the website. If the timing coincides with a spam update, review the website’s practices against Google’s spam policies rather than assuming the cause is the same.
A decline in ranking or traffic that coincides with an update does not, by itself, prove that the update caused it. Other explanations could include competitor improvements, seasonal demand, website changes, and shifts in search results.
Why ongoing SEO Matters
Google doesn't stand still, and neither should your SEO strategy. A reliable SEO company Adelaide businesses can work with should monitor ranking movements, interpret update announcements, assess organic traffic and identify changes that could affect long-term performance.
We believe effective search engine optimisation combines sound technical foundations, useful content and ongoing attention to how search evolves. By staying current with Google's continual changes, SEO experts can make better decisions, respond to genuine issues and build a stronger foundation for sustainable search visibility.
