Multishop allows you to multiplex one content across multiple domains.
rule: one(1) gTLD (.com/.net/..) and one or more(1+) ccTLD (.fr/.de/.com.uk/.etc) (also possible to use regional domains, i.e .asia/.eu(better for EU'er than .com
gTLD issues, SEO use IP of hosting as part of weight. Compete against all other gTLD's for keywords/ranking...
For single country shops outside of US, we recommend ccTLD of your country..to do otherwise is very difficult.
Simply adding a new domain using PrestaShop MultiShop feature by Geo Targeting country/region is the most significant SEO improvement you can make. Period.
Here is an example of what I mean, we are a 'very' small dev shop, when google search for 'PrestaShop JavaPro'.
four(4) of my shop domains appear, and this on a localized US-EN browser and with no 'special' effort.
I've set this environment up for 'many' using our 1.4 MultiShop Pro module and have helped 'many' others savvy shop mangers from 1.5 through 1.6.
Now take all that hard work building that catalog and it's accompanied SEO and multiply x 2 (weighted by country/region) for each domain...
Happy Geo Targeting, el