Barrie Smith from Search Engine People Blog posted, “Lost your rankings in Google? Built some dodgy links in the past that you’re now worried about? Been a victim of a competitor attack?
Google’s Penguin update, first released in April 2012 changed the face of link building as we knew it. Prior to that, sites linking to yours did little harm, at least not long-term. That all changed 2.5 years ago.
During that time numerous websites have dropped down, or completely out’ of Google as a result. Those shady link building tactics that once used to rank you prominently no longer work. They now have a detrimental affect on your website.
So where do you go from here? If your website has good or hard-to-get links pointing to it, and/or you simply want to keep the domain, you’ll have to remove those unwanted links if you want to remain or get back into the Google results.
Firstly though, if you’re a newbie to SEO or link building, you’ll perhaps want to know how to tell the difference between a ‘good’ and a ‘bad’ backlink…”