Google has periodic updates or changes in its algorithm. Google
Panda and Google Penguin are the major of them. Some of the important updates
are:
Panda/Farmer
— February 23, 2011
The first Panda update that was the second biggest update
till now, affected around 6% of the search results worldwide. It seemed to crack down on thin content, content
farms, sites with high ad-to-content ratios, and a number of other...
