International SEO is quite different from national SEO. If you are doing national search all you have to do is look into local domains or sub-domains or folders which are termed as geo-targeting. On the other hand you if you are to do international SEO, you have to know languages which are not your mother tongue. But if you have some knowledge about SEO, you can very quickly get proficient at international search.
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Is International SEO Really That Different From “National” SEO?