Moz Google Updates

How the Update Overlay Works in Moz

Moz Google Updates appears as a layer on ranking and Search Visibility charts in moz. Hovering over a marked date shows the update name, rollout period, and a short description. The data comes from MozCast, a tool that measures daily SERP volatility. Moz also publishes a public history of confirmed and unconfirmed updates, separate from the chart overlay.

You can also use MozBar to see some of this data in the browser.

• Overlay appears in Moz Pro ranking and visibility graphs.
• Tooltip shows update name, dates, and a description.
• MozCast measures daily SERP volatility to identify notable days.
• Moz maintains a separate public algorithm-change history.

Using the Overlay to Analyse Ranking Changes

The overlay helps you see whether a ranking drop or spike coincides with a known Google update. That can save time when you are trying to explain a sudden change in your search engine optimization tools performance. Check the moz recommended list of updates to cross-reference.

But correlation is not causation. A ranking change that lines up with an update date might be caused by a site error, a competitor change, or normal SERP churn. Google Search Central advises waiting until a core update rollout finishes before analysing its effect.

To assess impact, compare the week after the update completed with the week before it began. Analyse affected pages and queries separately.

• Check whether the ranking change aligns with a confirmed update date.
• Rule out site errors, competitor moves, or normal volatility first.
• Use Google's recommended before-and-after date comparison method.
• Analyse affected pages and queries individually, not as a whole site.

Limitations and Caveats of Third-Party Trackers

Practitioners disagree on how reliably tools like MozCast identify true algorithm updates versus ordinary SERP movement. Google has often not confirmed specific reported updates, so some events remain unconfirmed in Moz-style histories. Treat unconfirmed events as hypotheses, not facts.

Moz and other SEO publications distinguish between confirmed updates and unconfirmed volatility detected by third-party trackers. For the latest confirmed changes, refer to seo updates resources. Google algorithm update resources also provide additional context.

Algorithm tracking tools are complementary to Google Search Updates and Search Console, not replacements. Google Search Central says core-update analysis should wait until the rollout has finished.

• MozCast spikes may reflect normal volatility, not a confirmed update.
• Google does not confirm every update that third-party tools flag.
• Use Search Console alongside Moz for a fuller picture of your site's performance.
• Google advises against making immediate sitewide changes after a ranking drop.