Google released penguin udpate three years ago to punish websites who are using unethical and blackhat link building techniques. Other than that, many sites were manually punished for bad link profile. This led to many websites losing their rankings or in some case completely disappearing from the Google organic search listings. When a website lose its ranking, it loses targeted visitors which results in sales declines. That is why its very important that you run your link building campaigns systematically, after complete research.
Here is an infographic guide to how to go about link building and how to avoid being penalized by Google.
Manohar Bisht is the founder and chief content editor for Social SEO Team. He has been involved in execution of marketing campaigns for Small Businesses as well as large enterprises for last 7 years. He founded Social SEO Team to help small businesses avail high quality SEO and Link Building Services for their businesses without having to worry about shedding thousands of dollars.