Algorithm is software and it is a type of command which is followed by a computer or other digital devices. Google and other Search Engines also use algorithms to order and rank websites in search results. In SEO, Google’s algorithms are known as “Penguin” and “Panda”. Penguin analyses the quality of links used in a website, whereas, Panda assesses the quality of the web contents. In SEO, the main ranking algorithm is known as “The core algorithm”.