Just a cautionary tale if you’re planning to move your WordPress blog from wordpress.com to your own domain. When you move your content from one domain to another, conventional wisdom tells you to use a 301 redirect to inform search engines that the site is permanently moved. However, when a blog is hosted at wordpress.com, this option is not available to you.
One client hired me to set up WordPress and a premium theme at her domain. She already had a site at that domain, which she was replacing with a WordPress site. She also already had a blog hosted on wordpress.com, and was moving all those posts (about 50 of them) to the new site at her existing domain. I set up the theme for her, and she exported all of her posts from the wordpress.com site and imported them to her domain. I informed her about the legendary “duplicate content” penalty and told her that she would need to take down the content on wordpress.com, but not to do anything drastic before Google crawled her new site at her domain.
Fast forward 6 weeks; Google had found the new content, alright, but the old content still remained. Google must have decided the wordpress.com site was the original source of the content, and dropped her domain from its index completely. The domain, prior to the installation of the WordPress site, had an old static site that had previously had a moderate Google page rank.
The first step I told her to take was to remove the text of each of her posts from her wordpress.com site and replace it with a “this article has moved….” link to the same content on the new site. Once this was done, I could be sure there was no more duplicate content. I then submitted a “site reconsideration request” through Google Webmaster Tools. I explained that both domains were run by the same business (there had been no plagiarization) and that the duplicate content had been removed. There was a rather cryptic response about a week later that said the request had been processed, but it didn’t mention whether the domain would be re-indexed. It’s been about 3 weeks since then, and the domain is still not listed in Google’s index.
This is a pretty drastic implementation of the duplicate content penalty, as the client has gone from about 300 visits a day to only a handful. Be sure to avoid this situation altogether by removing duplicate content as quickly as possible when moving your site from wordpress.com to your own domain.