What is the best way to promote the site in different regions?

Question

Marketing

There is a regional site, which is registered in webmasters for one region.
Actually the question is what is the best way to promote it to others.
The first one that comes to mind is to create a subdomain for each city.
The second one I've seen is to set the auto-detection of the region and the ability to select it on one domain, with partial replacement of the text.
So how is it better and more practical?

Answer 1

Each method has its pros and cons. Subdomains are a good option, but whether it's optimal depends on the situation.
From relatively recent information, there is an article - rashad.su/multiregional-site I recommend that you read it.

Answer 2

The first one that comes to mind is to create a subdomain for each city.

The best way. And on each subdomain, register your titles and descriptions.