Tracking search position by region
Search results are local. The address decides which result you see.
The Google result for the same word changes from country to country. Tracking the position seen in France requires an address that comes out of France. Since we sell United States and Europe, tracking covers those markets.
Keep the address fixed
Changing address between measurements changes the result because of the address, not because of the site. Use the same address over time and the option to keep the same ones on renewal.
One address per market is enough for spaced lookups. Lookups in volume need more, measured by the limit the search accepts before showing a captcha.