Difference between Google Panda & Penguin

[motionz]

Google Panda is for site optimization. Google uses it to point out sites which are of low quality, such as duplicated content sites, poor quality content, using excessive keywords to drive traffic etc.
Google Penguin is an algorithm that Google uses to check the ingoing and out going links from any site. Google uses it to point out poor quality links, spam links of a site etc.