Different google results for differant countries
I was playing around with duckduckgo.com yesterday and found a lot of products for my niche which I hadn't heard of. They were mostly in the UK. This got me to thinking about different google results depending on the country. I had my sister do a search in Australia while I did the same search in Canada. They were mostly the same, just a few different results and ordering.
How would this affect what to include in the site, product suggestions, affiliates etc. just concentrate on the north American market?
Would this also affect the jaxxy and key word search results?
Any ideas as I haven't seen anything about this (yet). I could also have missed something really obvious (likely)