Link rot is no new matter in the World Wide Web. Just after the tremendous growth of the number of websites on the web it started to take existence. It is nothing but the broken links or the links that lead to nowhere but return result as page not found (404 error)or the document moved (301 error) and similar cases. Sometimes consciously or many times without this situation occurs. But the fact is very much of importance. It results in loss in SERPs and page ranks and more of importance is loss of unique visitors or the regular visitors. Ultimately a website that has rotten links or suffering of link rot is found to lose business. Go through web-developer-blog-infowaylive.blogspot.com for more details