A Disavow Link is a backlink that you do not want Google to count in their ranking of your website. You can tell Google to disavow a link by using the Google Disavow Tool.
Reasons for marking a link as a disavow link:
- The link comes from a spammy website.
- The link comes from a website that has been penalized by Google.
- The link comes from a website you do not wish to be associated with.