[mohanbhargav8]

There are many algorithm run by Google to in order to rank website Penguine,Panda,Humming bird ,pigeon,payday,pirate,EMD.Now we come to your question
Google panda is an algorithm is a search filter introduced in February 2011 meant to stop sites with poor quality content from working their way into Google’s top search results. Panda is updated from time-to-time. When this happens, sites previously hit may escape, if they’ve made the right changes. Panda may also catch sites that escaped before. A refresh also means “false positives” might get released.
Google launched the Penguin Update in April 2012 to better catch sites deemed to be spamming its search results, in particular those doing so by buying links or obtaining them through link networks designed primarily to boost Google rankings. When a new Penguin Update is released, sites that have taken action to remove bad links (such as through the Google disavow links tool or to remove spam may regain rankings. New sites not previously caught might get trapped by Penguin. “False positives,” sites that were caught by mistake, may escape.