What is deference between Humming Bird and Penguin ?
 

Both is Target Low quality website. What is deference between Humming Bird And Penguin ?

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Penguin focused on your link profile which is just an update of what it released a year ago.

Hummingbird on the other hand changes the process of how search is done. This time, with this update searching has become more in context.

This means you can do a more conversational search with Google. (e.g. asking questions consecutively).