Natural vs Unnatural Backlinks
Are We Responsible for Low Quality Backlinks?
But as anyone can link back to your pages, any spammy or low quality websites can link back to your pages without your knowledge. There's no restrictions for third party websites on creating backlinks to your site and you have no control over it. But Google take all of the backlinks into account when they evaluate your web pages with PageRank algorithm. Therefore you could lose your PageRank due to such spammy or low quality backlinks. It's a huge disadvantage for webmasters play by rules on the web. Eventhough you have no control over backlinks created by other parties, you had to be responsible for losing PageRank.
A Way Out for Webmasters
When to Use...
Prior to request or send suggestions, you have to find out whether you have low quality links pointing to your website or not. Fortunately, my friend Lisa is being discussing about backlinks lately and she has shown the way to check out backlinks pointing to a website. Take some time to review your popular backlinks and if you believe there are backlinks that may strongly affect on your site's reputation and PageRank, take a note of them and proceed.
I think the video talking about Disavow Links tool will clear out if you have more doubts about it. Let's hear what Matt Cutts has to say about this tool and proceed with steps if you have found low quality, unnatural or spammy backlinks.
* If your site rank has been affected by low quality backlinks, after submitting links to disavow and they become effective, file a reconsideration request to Google to evaluate your site with Google's quality guidelines.