International Targeting | Google Webmaster Tools Guide
If your business has international presence, you should not neglect this tool. The International Targeting tool in GWMT helps you implement hreflang annotation correctly.
There is also an option for you to specify which county you want to target for, but be careful with this because it will limit your site’s visibility to only the country you specify.
The bottom line is hreflang is the best way to go when it comes to international targeting.
Reference
https://support.google.com/webmasters/answer/189077?hl=en
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