Welcome to the Q&A Forum

what if someone has done this? remove article or links or build more quality links to nullify the effect? I have done this and lost my ranking to a great extent. What should i do now?

Well open site explorer is your friend! The best way to get a feel for evaluating link profiles is just to dive in and look at the link profiles of lots of sites - sites that rank, sites that don't and sites that should! Remember to take a good look at the sites themselves to get a feel for their layout, relevance and and high level feel for their authority. (humans are pretty good at evaluating this!) There are tools out there that will help you profile backlinks (such as Link Detective (http://www.linkdetective.com/) (which seems to be down at the moment) Here's an articles from the SEOmoz blog to get you started:: How to Check Which Links Can Harm Your Site's Rankings I don't know if you've got the SEO Toolbar installed (http://www.seomoz.org/seo-toolbar), it's a great way to keep an eye on sites as you surt and an easy way to jump into digging into a sites ranking factors. More than anything else, I would say that the most important thing is to develop an inquisitive nature! Good luck! <object id="plugin0" style="position: absolute; z-index: 1000;" width="0" height="0" type="application/x-dgnria"><param name="tabId" value="ff-tab-21"> <param name="counter" value="369"></object>

Brad is right, and adding on to that there might be more than 2 months delay in some cases. Most of mylinks doesn't show up even after 3 months.  Best is to check in Google Webmaster and see the latest links made to your site.