Diagnose the change before blaming links
A drop in traffic can coincide with a site change, indexing issue, demand shift, or search update. An odd domain appearing in a backlink report does not establish the cause.
We would first check Search Console messages, manual actions, and the pages and queries affected. Record the dates of migrations, redirects, content changes, and campaigns before choosing a remedy.
Review arrangements you actually control
If you bought ranking-focused links or hired someone who did, collect the details. Identify the pages, payment arrangements, anchors, and any steps already taken to remove or qualify problematic links.
Keep those facts separate from unsolicited links your site happened to acquire. A tool's toxicity label is not the same thing as a Google manual action.
Treat disavow as an advanced action
Google's disavow guidance says most sites do not need the tool and warns that incorrect use can harm performance. Its stated circumstances include a considerable number of spammy or artificial links and a manual action or likely manual-action risk.
Read the current guidance carefully. Do not upload your entire backlink export or disavow every low-scoring domain as routine maintenance. For a complex case, use someone qualified to assess the evidence.
Keep a recovery record
Document the suspected issue, supporting evidence, requests to remove links, and actual changes. Review the affected pages over time without promising an immediate rebound.
If the problem turns out to be broken redirects or missing content, fix that cause. A backlink cleanup campaign is not a substitute for checking what changed on your own website.