How many search algorithm changes were made in 2009?

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."

• Category

  Science & Technology

[Ian Lujan]

Could you tell me how algorithm's work with digital download sites that sell music? I know there are lot's of ways to manipulate sales and what goes where, but how and when can you tell if the stats are REALLY wrong and they are only changing algorithms to make sales and help who they want?

[strauchdarren]

thanks for this great information

[agapitoflores001]

Google is really great. Lots of new things everyday.

[aseohosting]

I like your video!..lots of information..Keep sharing some great ideas :)

[NorthPlum]

LMFAO! Cool info, but I thought you were Edward Current when I looked at the thumbnail.

[mrhumboldthippy arcataco]

thanks ,that was were i am with the content matters and then maby turn on the world ,thanks ,peace

[Igor Lebedev]

hahaa did he get out of jail recently. I am sorry, but it just seems as Googles image increases, Matt Cutts image is decreasing. He looked like a normal guy , giving some tips but now he just looks likes a hobo

[airpixel]

I think content is not king. i found pages wich have only a 1 line of text with title and the rest only adsense... and are on first page of google search result