How Google finds out duplicated content?

I wonder how Google finds out duplicated content and what should be changed on the site so that search engines properly index the pages and don’t penalize them for non-original content?

 

Google find out the duplicate content by use of google panda algorithm and if you do not want to penalize your website then never submit duplicate content and low level content. Because google panda is work against duplicate and low level content.

 

Always make sure that you have a rich content. Tel you buddy, no one can guess what google panda algorithm is about.

 

The duplicate content myth is not as bad as everyone thinks it is. Simply put do not copy and paste stuff from others sites on pages you want to rank and your fine

 

Google has some of the best mathematicians working on their algorithm so generally they can figure out if your content is duplicate. Just use common sense and don't duplicate content. It can lead into a grey area for some sites because, for community sites for instance, each town/city has similar content. That generally won't get penalized.

However, google's loves unique content you can't find anywhere else. But there is no need to look into it too deep. Just create good unique content that is useful for your niche and you shouldn't have a problem.

 

Exactly. So that means no auto-blogs or other sites that automatically generate content as well.

 

Autoblogs are easily found out by google algorithms. Authoritative sites are used as baseline for detecting duplicated content. Usually you can copy off smaller websites and not risk being detected as duplicate content.

 

If your site contains multiple pages with largely identical content, there are a number of ways you can indicate your preferred URL to Google. This is called "canonicalization".
In some cases, content is deliberately duplicated across domains in an attempt to manipulate search engine rankings or win more traffic. Deceptive practices like this can result in a poor user experience, when a visitor sees substantially the same content repeated within a set of search results.
Google tries hard to index and show pages with distinct information. This filtering means, for instance, that if your site has a "regular" and "printer" version of each article, and neither of these is blocked with a no index meta tag, we'll choose one of them to list. In the rare cases in which Google perceives that duplicate content may be shown with intent to manipulate our rankings and deceive our users, we'll also make appropriate adjustments in the indexing and ranking of the sites involved. As a result, the ranking of the site may suffer, or the site might be removed entirely from the Google index, in which case it will no longer appear in search results.

 

Google has its own algorithm, which checks all content of a website.

Finding out a duplicate content is not a big deal for google.

 

my blog has many duplicate content too, i just do two valuable things.. first, update post regularly and second give a backlink

 

Google has many algorithms running at its backend to take care of duplicate content over the web. In addition to this, it gets DMCA notifications from its users to remove duplicate content.

Unique content will allow search engines to index your pages without penalizing them. One more factor to take into account is the proper usage of long tail keywords in your content.

 

Google has its own ways of checking out websites, links , and content. Since Google has database and algorithm to retrieve past and new data, they can easily track which is which