Google has confirmed several smaller ranking algorithm updates on Twitter. According to Google, these were minor updates. Some webmasters saw dramatic ranking changes.
Some have asked if we had an update to Google Search last week. We did, actually several updates, just as we have several updates in any given week on a regular basis. In this thread, a reminder of when and why we give specific guidance about particular updates….— Google SearchLiaison (@searchliaison) November 12, 2019
How to check if your rankings have dropped
Use the ranking monitor in SEOprofiler to check if your Google rankings have dropped: