A "Penguin Update" is a name for Google’s change in organic search result algorithm, which can change the ranking of many websites involved in deceitful link building activities. During this update, Google verifies all the links pointing towards a website on various parameters and downgrades/upgrades the search engine ranking of that website. The period of 2010-2012 can be termed as a revolution in the field of link building. Almost all the website owners used to follow it as a ritual in SEO and ignored the quality of links they were building. But doing anything in excess definitely hurts one or the other day, which actually happened when more and more websites with poor user experience started outranking high quality websites in search results, which in turn made Google to take strict actions against those websites.