People who publish blogs which are relevant to a specific country may be able to focus search engine attention, for their blog - and better target readers in the country in question.
Google Webmaster Tools provides the "Geographical target" setting, which lets a blog owner select a single country. The setting increases search engine attention, for their blog, in the country selected.
If you are logged in to Google Webmaster Tools / Search Console, for a given blog, find the "Search Traffic" menu entry.
From "Search Traffic", select "International Targeting", then the "Country" tab. Click on "Target users in:", then select the appropriate country, in the pull down menu.
The list of countries, presented to you, appears to be rather complete. The list appears to be alphabetically sorted in the English language, as most of Webmaster Tools appears to be presented.
It's likely that your potential readers will be located using geolocation, so you should allow for some inaccuracies, in targeting specific readers. Readers who are located in regions close to national borders may appear to be located on either side of the border. Only one country can be targeted.
Note that this setting is not related to any Blogger dashboard settings, such as "Language" or "Time Zone", in "Language and formatting".
Also, note that the usefulness of this setting, like other search engine features, will depend upon your efforts in properly publicising the blog. Publicising the blog is still dependent upon your efforts - this setting, when used, simply focuses your efforts towards a single country.
Blogs That Interest Inhabitants Of A Specific Country May Use The Webmaster Tools "Geographical target" Setting
Use Search Console To Target Your Audience
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