Duplicate Detection and Clustering in Google SERPs

[engine]

According to a tweet from a Google engineer, Paul Haahr, the duplicate detection is changed over time, but it's been stable for years.

Obviously, we make improvements to our code over time, including dup detection. But that's been mostly stable for years.Duplicate Detection and Clustering in Google SERPs [twitter.com]

Garly Illyes also posted one of his Did you Know messages which said...

DYK usually when you see more than 2 results from the same site in the SERP, that's because other results score much lower for the query? [twitter.com...]

I'm not sure what the question mark at the end is for, and I suspect it's meant to be a full stop or exclamation mark.

It's interesting to note that part about the other sites being weak and scoring lower. I must have come across a number of those over time and it can be quite annoying. I don't see it the same way as being weak, but then, i'm not looking at this with the benefit of being on the inside of Google and having their tools.

[edited by: goodroi at 6:14 pm (utc) on Mar 31, 2017]
[edit reason] Fixed url [/edit]

[goodroi]

Did you know that Gary is stating a fact by asking a question and that is why he used a question mark? Sorry couldn't resist :)

Thanks for sharing. It is a great reminder that Google prefers to show variety in their serps. Seeing serps with multiple listings from one domain is a good sign of A) a branded search which we have poor chance of success or B) weak competition and ripe for plundering.

[engine]

I was thinking B ;)

[NickMNS]

Allow me to twist Gary's answer a bit, using the concept of the zero-sum game:

because other results score much lower for the query

This can be re-worded to read "because the results shown have abnormally high scores".

Anecdotally we see here in various WW threads many accounts of domain crowding involving sites such as Amazon or Ebay results. Is this tacit confirmation on Google's part that Google search algorithm allow superpower sites do not simply outrank their smaller competitors but quite literally bury them?

I am supposed to ask the question as statement.