Algorithm Updates · Diagnosis

How to Tell if Your Traffic Drop Is Caused by a Google Update

A traffic drop is not always an update. Here is how to tell if yours is, what a search volatility index does, how to check timing against known updates, and which other causes to rule out first.

Updated: July 2026
Written by: Andrew Odgers, Managing Director
Reading time: 9 minutes
The short answer

Tell if a drop is from an update by checking whether it lines up in time with a known update, affects many pages, and other causes can be ruled out. A search volatility index tracks how much rankings are fluctuating across the web, hinting at turbulence. Check timing by comparing your dates against official announcements and reputable trackers. First rule out technical issues, seasonality, tracking problems and manual actions. A volatility spike is a hint, not proof your site was hit.

Timing is the clue

How to tell if it is an update, and volatility indexes

You tell whether a traffic drop is from a Google update by checking whether the drop lines up in time with a known Google update, whether it affects many pages at once, and whether other causes can be ruled out. Timing is the biggest clue; because an update-driven drop usually coincides with a confirmed update and is broad, matching your dates against announced updates is the first step, ideally against the official update announcements. A search volatility index is a tool that tracks how much rankings are fluctuating across the web, giving a sense of whether Google is unusually turbulent on a given day. High volatility can hint at an update; because these tools show industry-wide movement, they help you see whether a drop is part of a broader shift or specific to your site.

DX 01

Check timing

Against known updates.

DX 02

Volatility tools

Industry-wide movement.

DX 03

Rule out the rest

Not every drop is an update.

Timing, other causes and limits

Checking timing, ruling out other causes, and the limits of volatility tools

You check timing by comparing the date your traffic changed against official update announcements and reputable update trackers. A close match strengthens the case; because updates are dated, lining up your analytics with confirmed update dates is one of the clearest ways to link a drop to an update. You should rule out technical issues like indexing or site errors, seasonal patterns, tracking or analytics problems, and manual actions before blaming an update. Not every drop is an update; because several things can reduce traffic, checking these first avoids misdiagnosing the cause and fixing the wrong thing. A volatility spike shows the wider web is moving, but it does not confirm your specific site was affected or why. It is a hint, not proof; because you still need to check your own data, treat volatility tools as one signal among several rather than a definitive answer, and once you have confirmed an update, you can move on to recovery.

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Frequently asked

Diagnosing a traffic drop

How do you tell if a traffic drop is from a Google update?
You tell by checking whether the drop lines up in time with a known Google update, whether it affects many pages at once, and whether other causes can be ruled out. Timing is the biggest clue. Because an update-driven drop usually coincides with a confirmed update and is broad, matching your dates against announced updates is the first step.
What is a search volatility index?
A search volatility index is a tool that tracks how much rankings are fluctuating across the web, giving a sense of whether Google is unusually turbulent on a given day. High volatility can hint at an update. Because these tools show industry-wide movement, they help you see whether a drop is part of a broader shift or specific to your site.
How do you check timing against known updates?
You check timing by comparing the date your traffic changed against official update announcements and reputable update trackers. A close match strengthens the case. Because updates are dated, lining up your analytics with confirmed update dates is one of the clearest ways to link a drop to an update.
What other causes should you rule out?
You should rule out technical issues like indexing or site errors, seasonal patterns, tracking or analytics problems, and manual actions before blaming an update. Not every drop is an update. Because several things can reduce traffic, checking these first avoids misdiagnosing the cause and fixing the wrong thing.
Does a volatility spike confirm your site was hit by an update?
No, a volatility spike shows the wider web is moving, but it does not confirm your specific site was affected or why. It is a hint, not proof. Because you still need to check your own data, treat volatility tools as one signal among several rather than a definitive answer.