Penguin 2.1 and hummingbird- 4 HOT tips
I have been doing a lots of case studies specially after 4th October 2013 ( i was not much concerned after the hummingbird but penguin 2.1 took me off by surprise) and now about 5 weeks after penguin 2.1, I can really advice on some points to you guys. As you can understand we cant reverse engineer the exact