Country domain.

A country domain is a two-letter top-level domain extension allocated to a particular country.

On a multilingual site it is one of three address structures: a separate domain for each country. The other two are the subfolder and the subdomain.

It gives the strongest local signal — for a search engine the target country is beyond dispute. But its cost is the highest too: each domain means a separate purchase, a separate renewal, a separate certificate and a separate configuration.

The real price is the division of authority: three separate domains mean building three separate authorities from scratch. Trust accumulated on a single domain spreads to every language, while separate domains cannot share that accumulation.

1. Country domain — strongest local signal, highest cost, most scattered authority.
2. Subdomain — the middle road; the separation is clear but authority can be divided.
3. Subfolder — authority is shared, setup and maintenance are cheapest.

For small and medium sites the answer is almost always the subfolder. A country domain makes sense only where operations genuinely diverge: a different legal entity, different prices, different legal obligations.

It is also worth knowing that some country extensions are used generically — in that case the extension carries no country signal and the reasoning behind the choice changes.

It brings an operational burden too: each domain means a separate certificate, a separate DNS configuration, a separate renewal calendar and separate monitoring. Three domains, three times the management load.

Some country extensions are used generically, and in that case the extension carries no country signal. If such an extension is chosen, the advantage of the local signal disappears and only the cost remains.

The real question when deciding is this: do the markets genuinely diverge — different prices, stock, legal entity, legal obligations? Without those conditions the cost does not repay itself.

1. Country domain — strongest local signal, highest cost, most scattered authority.
2. Subdomain — the middle road; the separation is clear but authority can be divided.
3. Subfolder — authority is shared, maintenance is cheapest. The right answer for most sites.
4. The deciding test — do the markets genuinely diverge?
5. Reversal — if this decision is changed later, accumulated indexing is affected.