So I currently have a shopping cart setup with 4 different stores that all share the same products, categories, etc. They include example.ca for Canada, example.co.uk for UK, example.in for India and an example.com for every other country including the USA.
What is strange, we rank VERY WELL in Google.ca with our .ca domain, VERY WELL in Google.co.uk with our .co.uk domain and VERY WELL in Google.in with our .in domain. The .com domain is a bit more tricky. So, we are literally nowhere to be found with many keywords we want in Google.com but at the same time, we rank very well for top keywords on search engines such as Google.nl or Google.au.
My question is, for example, how does Google determine a site's ability to rank on Google.au specifically? I mean, do they look for healthy .au backlinks pointing to the .com site? Could my .com ranking problems simply mean that there are more toxic US .com backlinks pointing to my .com site than toxic .au backlinks pointing to my .com site, or is there something else going on here? I don't believe my .com site was banned by Google.com because we do rank for some long tailed keywords and some specific keywords, but they are often on like page 8 or 9 vs 1-2 in other search engines.
I just find it very strange that the .com site could thrive in Google.nl, Google.au... heck even Google.in all show me listed for a top keyword as the first result of page 2! That same exact keyword on Google.com? Page 7. Again it does fluctuate a lot but it's never been under page 5 in Google.com.