There are many scenarios that can lead our algorithms to select URLs across domains.
In most cases, our algorithms select a URL based on signals that the webmaster implemented to influence the decision. For example, a webmaster following our guidelines and best practices for moving websites is effectively signalling that the URLs on their new website are the ones they prefer for Google to select. If you’re moving your website and see these new messages in Webmaster Tools, you can take that as confirmation that our algorithms have noticed.
However, we regularly see webmasters ask questions when our algorithms select a URL they did not want selected. When your website is involved in a cross-domain selection, and you believe the selection is incorrect (i.e. not your intention), there are several strategies to improve the situation. Here are some of the common causes of unexpected cross-domain URL selections that we’ve seen, and how to fix them:
http://googlewebmastercentral.blogspot.com/2011/10/raising-awareness-of-cross-domain-url.html
In most cases, our algorithms select a URL based on signals that the webmaster implemented to influence the decision. For example, a webmaster following our guidelines and best practices for moving websites is effectively signalling that the URLs on their new website are the ones they prefer for Google to select. If you’re moving your website and see these new messages in Webmaster Tools, you can take that as confirmation that our algorithms have noticed.
However, we regularly see webmasters ask questions when our algorithms select a URL they did not want selected. When your website is involved in a cross-domain selection, and you believe the selection is incorrect (i.e. not your intention), there are several strategies to improve the situation. Here are some of the common causes of unexpected cross-domain URL selections that we’ve seen, and how to fix them:
http://googlewebmastercentral.blogspot.com/2011/10/raising-awareness-of-cross-domain-url.html
