How does international SEO work?

A company sells to customers in the US, UK, and Australia. They have one website in English. They rank well in the US. But in the UK and Australia, they rank nowhere because they do not optimize for local search. Meanwhile, a competitor creates separate versions of their site for each country. They rank #1 in all three markets.

International SEO is about reaching customers in different countries and languages. If your customers are global, your SEO strategy must be global too.

International SEO means optimizing your website so it ranks in search results across different countries and languages, helping customers find you wherever they are located.

When you need international SEO

You need international SEO if:

Your customers are in multiple countries. If you sell globally, you need international SEO strategy.

You sell in multiple languages. Websites in English rank in English searches. Websites in French rank in French searches. You need localized versions of your site.

You have different products or services by country. Some products sell in the US but not in Europe. Your website should reflect what you offer in each market.

You operate in countries with their own search engines. Google dominates in the US and most of Europe. Baidu dominates in China. Yandex dominates in Russia. You need different strategies for different regions.

Strategies for international SEO

There are three main approaches to international SEO:

Country-specific domains

Create separate domains for each country: example.com for the US, example.co.uk for the UK, example.com.au for Australia. Search engines see these as separate websites for different countries.

Advantage: Search engines immediately know which country each domain targets. Disadvantage: You build authority separately for each domain. Each domain starts from zero.

Subdomains by country

Create subdomains for each country: us.example.com, uk.example.com, au.example.com. All subdomains share the main domain's authority.

Advantage: Subdomains inherit some authority from the main domain. Disadvantage: Search engines do not automatically understand country targeting from subdomains. You must use search console to set country targeting.

Subdirectories by country

Create subdirectories for each country: example.com/us/, example.com/uk/, example.com/au/. All subdirectories share the main domain's authority.

Advantage: Strongest authority sharing. Subdirectories inherit full domain authority. Disadvantage: You must use search console to set country targeting for each subdirectory.

Hreflang tags for international SEO

Hreflang tags tell search engines which version of your page to show to users in different countries. Without hreflang tags, search engines get confused about which version targets which country.

An hreflang tag looks like: <link rel="alternate" hreflang="fr" href="https://example.com/fr/about">

This tells Google: "If someone searches in French, show them this French version of the page."

Use hreflang tags if you have the same content in multiple languages. Without hreflang tags, Google might rank the wrong language version for certain searches.

Keyword research for different countries

Keywords differ by country and language. Search volume, keyword difficulty, and search behavior are different in each market.

"Running shoes" is popular in the US. "Trainers" is the same product in the UK. You need keyword research for each market.

Use keyword research tools that show search volume by country. Ahrefs, SEMrush, and Moz all support international keyword research. Research keywords for each target country in their language.

Search volume and difficulty change by region. A keyword might have 500 monthly searches in the US but only 50 in Australia. Prioritize keywords with meaningful search volume in each market.

Localization vs. translation

Translation means converting words from one language to another. Localization means adapting content for a specific country and culture.

Translation alone is not enough. A literal translation can be confusing or offensive. Localization means understanding local culture, preferences, and search behavior.

Example: A fitness brand translates their content to Spanish. The translated site ranks nowhere in Spain because the content uses Mexican Spanish, not European Spanish. The search behavior is different. The terminology is different. Localization, not translation, fixes this.

Hire native speakers and cultural experts for each market. They understand local search behavior and cultural nuances that automated translation misses.

Technical SEO for international websites

International websites need specific technical setup:

Language tags. Use hreflang tags to specify language and region. Set language in the HTML lang attribute: <html lang="en-US"> for US English, <html lang="en-GB"> for UK English.

Search console setup. Create separate search console properties for each domain, subdomain, or subdirectory. Tell Google which country each property targets.

Sitemap by country. Create separate sitemaps for each country version of your site. Submit each sitemap to search console for that country.

Server location. Hosting your website in a specific country can influence country targeting. A website hosted in the US might rank better for US searches. Consider hosting in the primary market you serve.

Building authority in international markets

Each market needs its own authority building:

Backlinks from local sites. Get links from websites in each target country. A UK backlink tells Google your UK site is authoritative in the UK.

Local citations and directories. Get listed in local directories for each country. A listing on a UK directory helps your UK site rank.

Local content and events. Write about local events, local news, local trends. Show you understand each market, not just translating content.

Customer reviews in local languages. Encourage customers to leave reviews in their language. Local reviews build credibility in each market.

Frequently asked questions