The Hidden Triggers Behind Your Website’s Traffic Plunge—and How to Beat Them Fast

Some SEO tools, like Ahrefs, include visual markers showing when algorithm upgrades occurred.

Plus, you can use Mozcast and Semrush Sensor as indicators if an update is currently affecting rankings.

If you suspect a core update might be the reason for your traffic decline, the next step is to read up on SEO news sites and forums like Search Engine Land and Search Engine Journal to find out what the latest update targeted. You can also look at changes in the Google documentation.
These sources might give you a better idea of why the update may have negatively affected your site. Examining patterns in your rankings or traffic can help you confirm your hunch.