Algorithm Updates
If you notice a drop in organic traffic or keyword rankings, you will want to see if Google has made any big algorithm updates that correspond to a drop in organic traffic or keyword rankings. You can view information on these sites about recent Google Algorithm changes:
Lists
https://www.mariehaynes.com/algo-changes-and-more/
https://moz.com/google-algorithm-change
https://www.rankranger.com/google-algorithm-updates
https://www.sterlingsky.ca/google-local-changes/
Tools
https://www.brightlocal.com/free-local-seo-tools/local-rankflux/
https://www.semrush.com/sensor/
https://www.rankranger.com/rank-risk-index
https://barracuda.digital/panguin-google-algorithm-timeline/