Thanks Federico and Tim. I had a mistake about this. Dofollow is default

Hello,

My website is http://www.vietnamvisacorp.com is using the href links without meta tag rel="dofollow" such as I am using . Should I put ref="dofollow" in this: 

Thank you!

Hi,

I saw my website have a problem about meta language, I do some search and found that I need to add  on the , with 'll' is language code and 'cc' is country code.

But I am confused what should I do, because my website is world wide, not launch at specific any language and country. Please give me an advice in this case.

Thanks,

yes, robots.txt is the bad way, I will try to use canonical tag. Thanks for your help!

I have tried to use cross-domain canonical, but this is too difficult for me. So, I want to confirm if I use the robots.txt file is ok or not?

Thanks

Hi,

I have a primary website and beside that I also have some secondary websites with have same contents with primary website. This lead to duplicate content errors. Because of having many URL duplicate contents, so I want to use the robots.txt file to prevent google index the secondary websites to fix the duplicate content issue. Is it ok?

Thank for any help!

Hello,

I have use the http://copyscape.com to check the duplicate content and found that my website have some errors duplicate contents with other competitors website. But a problem is, I could not define the reason of this (my website copied the competitors website or they copied of mine)

To solve this issues, should I modify a unique my contents (this is difficult) or anyone have a good solution for this problem? Please give me advice?

Thank you!

Hello,

Anyone could tell me the benefit SEO of link title attribute. Is **Link Title **ranking factor?

Thanks

Thanks my friends!

I redirected ErrorDocument 404 http://www.vietnamvisacorp.com/404.shtml

But I am confusing about HTTP status code 200 OK and 404 Not Found. Should I use 200 OK or 404 status for these pages?