I want to have results from lots of different countries stored in my database. Then I want to grab the country code of the visitor and only show them the results from their country.
For example if they are in the UK, when they visit my site they will only see results of items which were posted in the UK.
My concern with this is I am showing different content to different users and I'm not sure what the SEO implications are of this. Is there anything to be worried about, or should I forward users to a country specific sub domain or extension?
This is the best information I can find on it: http://googlewebmastercentral.blogspot.co.uk/2010/03/working-with-multi-regional-websites.html