Whats the best method in having multiple domains online with the same content so that it does not affect SEO.
Say a www.domain.com and www.domain.com.au. The *.com.au domain has significant SEO history and the *.com domain is brand new and currently only has a 301 redirect to the .com.au domain.
Would I just put a copy of the same website up on both domains or will a redirect from one domain to the other do the trick?
What would be the best method to go about this?