I don’t believe this will reduce duplicate content, the problem exists because the content can live under multiple categories, like Ecommerce and SEO, for example. The content will be spidered under both category pages. Better to specify a canonical version, and I believe it’s better to strip out the category name for another reason – usability. It’s easier to read the shorter URL and it may attract higher click through in search engines.
http://www.getelastic.com/canonical-url-tag/
http://www.getelastic.com/short-urls/

2.For some posts, the writer may put it into more than two categories, will it cause duplicate content issue if the url setting like yours?

Yes, it’s possible that there is duplicate content because I have content under multiple categories. However, I typically change the posts to have a preview only after a few days, so the category page will only show the first couple paragraphs of each post as a “preview”, the whole page will appear only under the permalink URL. I’m not too worried about duplicate content because it’s all content on my own site, not across other sites (though my blog gets scraped a lot, Google finds the content on my site first). Google will show the content and select which page it has indexed from my site to return in search engines. It’s more likely to select my permalink page if the keyword search matches content in the body, below that introduction text. In the rare case it shows the category page, that sucks, but I think that’s rare for a blog.

3. My blog has been indexed by Google. May I still switch it from /category name/post title/ to /post title/?

If you decide to change any URLs, be prepared to do a lot of 301 (permanent) redirects – for every single page! This is crucial any time you change a URL that holds the same content. If you’ve been blogging for a long time, my opinion is to keep the structure you have rather than switch it over because it’s not going to have a huge impact on SEO to not have categories in your URLs. But it might negatively impact you for a while if you all of a sudden change your URL names.

4. BTW, I saw you doesn’t use feedburner to manager your RSS Subscription. Is there any special reason?

I used to use Feedburner but there were some limitations to its functionality, so we switched to the Aweber service.

I am still waiting for your answer. Pls kindly help to answer my above questions. THX

Thanks for your quick response and clear answer. Still got other questions hope you can help to answer.

1. Some body says use /category name/post title/ can reduce duplicate content issue. Their method is different with yours but the reason is the same. Why ?

2.For some posts, the writer may put it into more than two categories, will it cause duplicate content issue if the url setting like yours?

3. My blog has been indexed by Google. May I still switch it from /category name/post title/ to /post title/?

4. BTW, I saw you doesn’t use feedburner to manager your RSS Subscription. Is there any special reason?

Thanks

1. I believe that was designed for us by our design firm.
2. Related post plugin is http://rmarsh.com/plugins/similar-posts/
3. I take out the category name to reduce duplicate content, which is better for SEO.

Linda

1. How do you add the subscription section at the bottom of your post. Is it designed by your theme or using some plugin? if it is a plugin? What’s the name of it?

2. What’s the name of your related post plugin?

3. Why do you set your url like yourdomain.com/post title/? what’s the difference between it with yourdomain.com/category name/post title/? Which one is better for SEO purpose?

THX