The SERP sensor measures how much Google search results are changing day to day, across every major industry category. High volatility = an algorithm update is rolling out, rankings are unstable, and you should wait before making big changes to your site.
It's the single most useful tool for staying calm during ranking drops. Saw a 30% traffic drop yesterday? Check the sensor. If volatility is at 9/10 across your category, every site is moving — it's not you, it's an update. Wait 7-14 days for the dust to settle before doing anything drastic.
We track 20+ industry verticals (finance, health, ecommerce, local services, etc.) separately, because updates often hit specific categories harder than others.