How Google judge duplicate content

[abirhasan]

Hello Friends,

Here i want to know that how google analyze which site has the duplicate content and which is original
i. e. if i have a website with fresh content and google index my site, and some one copy my site content and publish it on web like create a blog/website or post it some spamy website then how google analyze which is original or which is duplicate, lots of time we have seen our site content in different site's pages

If anyone have idea please tell me

Thanks

__________

abirhasan

[Sogo7]

Google timestamps its records  like this example pulled at random from Google's  web cache.

http://webcache.googleusercontent.com/search?q=cache:Sv1Su8QAsPEJ:www.urbandictionary.com/define.php...

"It is a snapshot of the page as it appeared on 22 May 2012 09:31:59 GMT"  so Google knows who published what and roughly when an article was first published by a web site.

How often Google decides to re-index a site depends upon the content and how often it changes. At first they start once per week, then if new things are found they comeback daily and even hourly if lots is happening. But if nothing has changed they visit less often maybe once per month or even once per year. So if you make changes remember to resubmit your sitemap and learn to read your server logs or websaite analytics!