How many search algorithm changes were made in 2009?

Channel:
United States Google Search Central
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751,000
Published on ● Video Link: https://www.youtube.com/watch?v=1_jm_isupFY


Duration: 1:53
17,271 views
42

Pulkit Agrawal in Ahmedabad, India asks: "Can you please tell us:
a) How many changes did Google make to their primary search algorithm in 2009 till date?
b) Is content still the king or something else (structure) has taken over? This is some big buzz in the Internet community."



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Tags:
google
search
algorithm