You're very likely to find an article like this somewhere else. And then, somewhere else again. That's because, according to Google, 25-30 percent of everything online is a duplicate of something else somewhere else.

Engineer Matt Cutts attempts to answer frequently asked questions about how duplicate content affects a site's SEO. According to him, Google doesn't see duplicates as spammy content, but their algorithm groups all of the duplicated content into a single lump and attempts to find the best of it all.

Watch the video below: [Search Engine Roundtable]