SEO Myths Debunked – Google Algorithm updates don’t happen often

Each year, Google alters its search algorithm around 500 times. While the majority of these changes are small, Google sometimes rolls out a “significant” algorithmic upgrade (such as Google Panda and Google Penguin) that affects search results in a huge way.

For search marketers, understanding the dates of these Google updates can assist help with changes in positions and organic website traffic and eventually improve search engine optimization.

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http://madscientistdigital.com/2014/09/seo-myths-debunked-google-algorithm-updates-don039t-happen-often/