Why it matters to a buyer
Google has repeatedly said most sites never need to use this tool, and using it on ordinary, low-quality links that are simply doing nothing is more likely to remove value than protect the site. For a buyer, the real use case is narrow: a manual action tied to unnatural links, or clear evidence of a negative SEO attack that could not be resolved by contacting the linking sites directly. An agency reaching for a disavow file as a routine monthly task is treating a rare, targeted tool as a habit.
How it is measured or applied
Building one starts with exporting the backlink profile from Search Console or a third-party tool and separating links that are genuinely manipulative, paid, part of a link scheme, or from clearly spun-up spam domains, from links that are merely low quality but not manipulative. Site owners are told to contact webmasters first to request removal, and disavow only what removal could not fix. The file is a plain text list of URLs or, with a domain: prefix, entire domains, uploaded through Search Console, and its effect is checked over following months by watching whether any related manual action is lifted.
Sources
- Disavow links to your site, Google Search Central Help
