Enter all of your bad links now:
A disavow file is a .txt file that contains instructions to Google. It is used to let them know that you’d like them to ignore a bunch of links that are pointing to your website, usually because they’re having a negative impact on your site rankings, or could do.
A great disavow file contains both root domains and links to individual pages along with comments detailing your removal attempts for each of the links, where necessary.
Example of a Good Disavow File:
# Negative SEO Attack - ALL SPAM Domains
domain:fundir.info
domain:lqdirectory.in
domain:simplylistings.com
# Made Contact: 06/10, 10/10, 18/10 with No Response
somedomain.com/articles/yourpage.html
# Directory Network - Trying to Charge for Link Removals
domain:stupidlinks.info
domain:nastydirectory.net
domain:uncleanchors.com
domain:simplymoneylinks.co.uk
When Should You Submit One?
If your rankings have suffered recently, or even if they haven’t but you think they may in the future then it’s probably a good idea for you to consider submitting a Disavow file.
You can submit a Disavow file if:
Always remember, a good link follows Google's guidelines. A bad link does not. A bad link is simply one that violates Google's guidelines. Consequently, it can lead to Google penalties.
An example of bad links may be: Link farms, paid links, link wheels and other black hat link-building techniques that many webmaster or SEO Professionals tend to use so they can improve their site or clients' site ranking on Search Engines.