The Hidden Triggers Behind Your Website’s Traffic Plunge—and How to Beat Them Fast
You can filter the Traffic Acquisition report in Google Analytics by referral traffic and compare it to earlier time frames for big changes.

If a site sends you significantly less traffic, see if they stopped linking to you. Many SEO tools like Ahrefs, Semrush, and Ubersuggest also include backlink analysis tools to help you figure out if you lost high-quality links around the time you started losing traffic.

In addition, look for new links from toxic or spammy sites in the Links report in Google Search Console. These links can damage your site’s authority or rankings.