Some things to know about this tool:
- Only site owners can disavow links. If you have an agency or consultant handling your SEO strategies, you’ll have to change their level of access. Google restricted access in this way because webmasters should not go crazy disavowing links.
- Disavowing a link is just a suggestion, not a directive, to Google (akin to demoting Sitelinks in Google Webmaster Tools). However, Matt Cutts claims that it will typically be considered. It’s not a bad idea to continue reaching out to webmasters to have them remove unwanted links to your site, in addition to using this Disavow Links tool.
- It will take some time for Google to update the disavowals in their index. Google needs to re-crawl and re-index your site in order for the disavowals to be honored. Try using Fetch  to have Googlebot recrawl your site quicker.
- This tool can be used by sites that did not receive an unnatural link warning . Google is constantly rolling out updates, so this is a good opportunity to look at your backlink profile and pre-emptively do some house cleaning. For further advice – read Steve McQuaide’s article “What to do about Google’s confusing link warnings .”
- If you received an Unnatural Links warning but haven’t yet filed a reconsideration request , this Disavow tool will help make your case stronger. We recommend that you wait a few weeks for the disavowals to be recognized by Google, then submit the reconsideration request.
- Inbound links with brand-focused anchor text is one of the strongest signals of a natural link. Users should know exactly what kind of content they will land on when they click on a link to an external site. Misleading anchor text is one of the factors that lead to the unnatural link warnings in the first place.
- Don’t be afraid to link freely! Even as the web evolves to incorporate social media mentions and user experience signals, the search engines still view the internet as an interconnected web of documents. If someone links to you in a relevant way, don’t go crazy disavowing links because you’re afraid they may appear unnatural.