Google’s Matt Cutts replied a question putted forward by another Googler, John
Mueller, on YouTube asking, “Should I add an archive of hundreds of thousands
of pages all at once or in stages?”
The question is, if you build out a new section of your website with masses
of content – is it safe to just launch them all at once or should you do
smaller break apart at a time?
Matt Cutts said that if a site released hundreds of thousands of pages suddenly,
it may raise a red flag and stipulate a manual review by the Google spam team.
And if you do not want Google to manually review your site and you don’t want
to draw attention to your site; you may not want to release too many pages too quickly.
Matt said that if you can slowly roll them out in larger blocks but not all of
them at once, then do it that way. If not, it should be fine, but someone at
Google may manually review it. He also added that it is rare to see a site
release so many new pages and for all those pages to all be unique and of good
quality. He didn’t say it was impossible.