Did Google Just Update their Search Ranking Algorithm?

Only Google knows for sure if they did an update to their Search Ranking Algorithm; but we do have some tools to see how rankings have changed  in  search results over the past few days.

Here’s a quick list:

https://moz.com/mozcast/
https://serpmetrics.com/flux/
https://algoroo.com/
https://www.advancedwebranking.com/google-algorithm-changes/
https://www.accuranker.com/grump
https://www.rankranger.com/rank-risk-index
https://cognitiveseo.com/signals/
https://www.semrush.com/sensor/?category=&db=US