Assuming you mean **Google’s algorithm changes affecting SEO**, here’s the update as of **September 29, 2026**. ### Latest confirmed changes - **September 2026 spam update:** Started September 24, applies worldwide across all languages, and may take two weeks to finish. Google has not yet marked it complete. ([status.search.google.com](https://status.search.google.com/incidents/XhUDXP7A67iHCD2kmbVu)) - **Latest broad core update:** The May 2026 core update ran from May 21 to June 2. Core updates reassess search results broadly; a ranking drop does not automatically mean your site violated a policy. ([status.search.google.com](https://status.search.google.com/summary)) - **Discover changes:** The February 2026 Discover update emphasized locally relevant, original, in-depth content and reduced clickbait. This concerns the Discover feed specifically. ([developers.google.com](https://developers.google.com/search/blog/2026/02/discover-core-update?utm_source=openai)) ### What to do for your website 1. **If traffic recently dropped:** Compare affected pages and queries in Google Search Console against update dates. For core updates, Google recommends waiting at least one full week after completion before assessing results. ([developers.google.com](https://developers.google.com/search/docs/appearance/core-updates)) 2. **If a spam update coincides with losses:** Audit compliance with Google’s spam policies. Improvements can take months to be recognized. ([developers.google.com](https://developers.google.com/search/docs/appearance/spam-updates)) 3. **Avoid panic changes:** Improve usefulness, reliability, and readability rather than chasing quick SEO fixes. Deleting content should be a last resort—not the default response. ([developers.google.com](https://developers.google.com/search/docs/appearance/core-updates)) **Are you looking for an update history, or help diagnosing a traffic drop on your site?**

If you mean **tracking Google Search algorithm updates for SEO**, use these three together: | Tool | What it tracks | |---|---| | **Google Search Status Dashboard** | Officially announced ranking updates and rollout dates. Subscribe to its RSS feed for notifications. ([developers.google.cn](https://developers.google.cn/search/help/status-dashboard?hl=en&utm_source=openai)) | | **Semrush Sensor** | Daily ranking volatility by industry, country, and device, with alerts for significant fluctuations. These are signals—not confirmation of an update. ([semrush.com](https://www.semrush.com/kb/652-sensor?utm_source=openai)) | | **Google Search Console** | Your website’s clicks, impressions, and ranking changes to assess whether your site was affected. ([developers.google.com](https://developers.google.com/search/docs/monitor-debug/debugging-search-traffic-drops?utm_source=openai)) | **Suggested workflow:** Monitor volatility, check Google’s official announcements, then compare your Search Console performance before and after the update. For core updates, Google recommends waiting at least one full week after the rollout finishes before analyzing the impact. ([developers.google.cn](https://developers.google.cn/search/docs/appearance/core-updates?hl=en&utm_source=openai)) Don’t assume every traffic drop is algorithm-related; technical issues and changing search demand can also cause declines. ([developers.google.com](https://developers.google.com/search/docs/monitor-debug/debugging-search-traffic-drops?utm_source=openai)) Are you looking for **tracking tools**, **recent updates**, or **help investigating a website’s traffic drop**?

**SERP flux** means **search-results volatility**: how much rankings change over time, usually day to day. Low flux means relatively stable results; high flux means substantial movement. ([ahrefs.com](https://ahrefs.com/blog/serp-volatility/?utm_source=openai)) **Example metric: Semrush Sensor** - **Scale:** 0–10, from low to very high volatility. - **Calculation:** Compares daily results for a fixed keyword set, using a proprietary formula based on normalized Levenshtein distance—a measure of differences between result lists. ([semrush.com](https://www.semrush.com/kb/652-sensor)) **Interpretation:** A spike can signal an algorithm update, but doesn’t prove one occurred or mean your site lost rankings. Positions can move up or down. ([semrush.com](https://www.semrush.com/kb/654-is-a-high-or-very-high-score-bad-for-me)) Are you looking for a **definition, a calculation formula, or a specific tool’s flux score**?

If you mean **Google Search algorithm changes**, here’s the latest as of **September 29, 2026**: ### Latest confirmed updates - **September 2026 spam update:** Started September 24 and is still rolling out. It applies worldwide, across all languages, and may take up to two weeks. ([status.search.google.com](https://status.search.google.com/incidents/XhUDXP7A67iHCD2kmbVu)) - **August and June 2026 spam updates:** Earlier spam updates began August 18 and June 24. Both are complete. ([status.search.google.com](https://status.search.google.com/summary)) - **Latest core update:** The May 2026 core update ran from May 21 to June 2. Core updates broadly reassess search results to prioritize helpful, reliable content—not target particular websites. ([status.search.google.com](https://status.search.google.com/incidents/wdAXJk6LRRihEjpzEeWE)) ### What this means for your website - **After a spam update:** Review Google’s spam policies and correct violations. Improvement can take months; it isn’t guaranteed. ([developers.google.com](https://developers.google.com/search/docs/appearance/spam-updates?utm_source=openai)) - **After a core update:** Wait at least one full week after completion, then compare affected pages and search queries in Search Console against a pre-update period. Avoid drastic changes for small ranking drops; focus on meaningful content improvements. ([developers.google.com](https://developers.google.com/search/docs/appearance/core-updates)) **Are you looking for an update history, or investigating a traffic drop on your website?**

## Latest Google algorithm updates *As of September 29, 2026, according to Google’s official dashboard.* | Update | Timing | |---|---| | **September 2026 spam update** | Started **September 24**; still rolling out. Applies globally, across all languages, and may take up to two weeks. | | August 2026 spam update | Started August 18; completed. | | June 2026 spam update | Started June 24; completed. | | **May 2026 core update** | Ran **May 21–June 2**; the latest confirmed broad core update. | Sources: Google’s ranking-update history and rollout announcements. ([status.search.google.com](https://status.search.google.com/summary)) ### What these updates mean - **Core updates:** Broad changes to how Google evaluates and ranks helpful, reliable content—not actions targeting specific websites. ([developers.google.com](https://developers.google.com/search/docs/appearance/core-updates)) - **Spam updates:** Improvements to systems that detect violations of Google’s spam policies. Affected sites should review their compliance. ([developers.google.com](https://developers.google.com/search/docs/appearance/spam-updates?utm_source=openai)) ### If your rankings dropped 1. **Check the timing** against confirmed updates. 2. **For core updates, wait at least one full week after rollout finishes** before comparing Search Console performance with a pre-update period. 3. Review affected pages and queries. Prioritize meaningful content improvements rather than quick fixes or mass deletions. ([developers.google.com](https://developers.google.com/search/docs/appearance/core-updates)) Are you looking for **update history**, or help diagnosing **a website’s traffic drop**?

Do you mean **rank assets by volatility**, **explain volatility rank (IV rank) in options**, or **explain search-ranking volatility in SEO**?

Which kind of **algorithm change tracking** do you mean? - **Google/SEO:** tracking search ranking updates and their impact on your website. Google’s Search Status Dashboard lists confirmed ranking updates. ([status.search.google.com](https://status.search.google.com/?utm_source=openai)) - **Social media:** monitoring changes to feed or recommendation algorithms. - **Your own software or ML models:** tracking versions, logic changes, and performance. Which platform are you working with, and do you want a **tool, tracking template, or implementation guide**?

**SERP volatility** means how much search engine results page rankings change over time. High volatility means substantial ranking movement; low volatility means results are relatively stable. ([semrush.com](https://www.semrush.com/kb/652-sensor?utm_source=openai)) To monitor it: - **Semrush Sensor** tracks daily volatility by industry, country, and device on a 0–10 scale. ([semrush.com](https://www.semrush.com/kb/652-sensor?utm_source=openai)) - **Google’s Search Status Dashboard** lists confirmed ranking updates—volatility alone doesn’t confirm an update. ([status.search.google.com](https://status.search.google.com/summary?utm_source=openai)) - **Your keyword tracking** helps distinguish broader market fluctuations from changes affecting your particular keywords. ([semrush.com](https://www.semrush.com/news/267569-semrush-sensor-personal-score/?utm_source=openai)) Are you looking for **today’s SERP volatility** or help understanding **your site’s ranking changes**?

Do you mean **Google SEO algorithm updates**, or updates on a platform like Instagram, TikTok, or YouTube? If you mean Google, use this tracking workflow: - **Confirm updates:** Check the Google Search Status Dashboard for official ranking-update announcements and rollout dates. ([status.search.google.com](https://status.search.google.com/summary?utm_source=openai)) - **Measure impact:** Compare Search Console clicks, impressions, and positions across affected pages and queries. Also check technical issues and seasonality rather than assuming an update caused the change. ([developers.google.com](https://developers.google.com/search/docs/monitor-debug/debugging-search-traffic-drops?utm_source=openai)) - **Allow time:** Google recommends waiting at least one full week after a core update finishes before analyzing its impact. ([developers.google.cn](https://developers.google.cn/search/docs/appearance/core-updates?hl=en&utm_source=openai)) Suggested tracking sheet: `Update | Start/end dates | Affected pages | Traffic/ranking changes | Other site changes | Follow-up` **Which platform are you tracking, and do you want update alerts or a performance-tracking setup?**

**Algorithm monitoring** means checking whether an algorithm continues to work as intended after deployment—detecting declining performance, changing inputs, and unexpected outcomes. ([nvlpubs.nist.gov](https://nvlpubs.nist.gov/nistpubs/ai/NIST.AI.800-4.pdf?utm_source=openai)) For **AI or machine-learning systems**, key areas include: - **Performance:** Are predictions still accurate? - **Data drift:** Have input patterns changed? - **Fairness and safety:** Are outcomes harmful or uneven across groups? - **Response procedures:** Who investigates problems, and when should the system be updated or stopped? ([airc.nist.gov](https://airc.nist.gov/airmf-resources/playbook/measure/?utm_source=openai)) Do you mean monitoring **AI models**, **trading algorithms**, **software performance**, or **changes to search/social-media algorithms**?