How can I create my own page with contacts for different regions for an online store?

Question

Search Engine Optimization

How can I create my own page with contacts for different regions for an online store?
The task is to ensure that search engines correctly determine the region. Is it possible through JavaScript?
I don’t want to make a region for the site based on subdomains or folders, because all other content will be the same for all regions.

Answer 1

I don't want because

but you will have to collect from different and the same common part through include(), because you still need several pages)
For Tver (for example):
FOR ROBOTS:
Several files and in those that differ from the general one, you need to add a location tag:
FOR PEOPLE: You
determine the city yourself by IP.
By clicking on the link /contacts/ go to the desired URL:
code 200 if not Tver (main, and links to other cities in the text): /contacts/index.html (or just /contacts/)
code 301 if Tver: / contacts/tver.html