I have searched quite a bit for this and I am not happy enough with what I have read. I also found these questions here:
I have a news/social network site in Spanish and wanted to know what would be the best format to implement.
Currently, I have both running. But I want to know if it is better to have only one, if so, which one would best fit my site? Or, can I keep both of them?
I want to target most search engines, not only Google.