GLOSSARY
Search Marketing FAQ
Concise answers to the most common questions relevant to SEO, GEO, CRO, and PPC. Filter by discipline, platform, and topic. Cortex references its corpus of platform-published best practices to draft each answer, with citations linking back to the source documents.
Showing 697-720 of 1947 questions
Should I target by language, country, or both?SEOInternational SEO+
Target by language when content is identical across countries that share it (one English page for US, UK, AU). Target by country when pricing, shipping, regulations, or language dialect differs (en-us vs en-gb showing different currency). Target by both when you serve multiple languages in multiple markets - hreflang supports language-country pairs.
in International SEO
What are the best practices for implementing hreflang?SEOCrawl EfficiencyInternational SEOSitemaps+
Start with one language cluster (en plus one alternate) before site-wide rollout. Use ISO 639-1 language codes and ISO 3166-1 Alpha 2 region codes. Pick one method (HTML head, sitemap, or HTTP header) and stick with it. Validate every page with a crawler that checks reciprocal references.
in International SEO
Where should hreflang tags be placed - HTML, XML sitemap, or HTTP headers?SEOInternational SEOSitemaps+
HTML head is best for small sites with few language versions. XML sitemap works better for larger sites where adding many head tags would bloat page size, and is the only option when you cannot edit the page head. HTTP headers fit non-HTML documents like PDFs. Use one method only to avoid conflicts.
in International SEO
Do hreflang tags need to be bidirectional?SEOGoogleInternational SEO+
Yes. Every page in a hreflang cluster must link to every other page in the cluster, including itself. If the English page references Spanish but the Spanish page does not reference English back, Google treats the relationship as broken and may ignore the entire hreflang annotation. Reciprocal links are the rule, not optional.
in International SEO
Does every page need a self-referential hreflang tag?SEOGoogleInternational SEO+
Yes by best practice, not strictly required. Each page in a cluster should include a hreflang tag pointing to itself. Self-references are part of Google's specification and help search engines understand the canonical language version. Missing self-references create ambiguity, are flagged by Semrush and Ahrefs audits, and can cause Google to ignore tags.
in International SEO
Should hreflang URLs be absolute or relative?SEOInternational SEO+
Use absolute URLs. Google's spec accepts relative URLs but they break more easily, especially if the original URL changes or the page moves domains. Absolute URLs with the full https:// path are unambiguous and survive CMS migrations. HubSpot and Yoast both default to absolute hreflang URLs for this reason.
in International SEO
Should language and country codes use specific ISO casing conventions?SEOGoogle+
Yes. Google requires ISO 639-1 (lowercase, two letters) for the language code and ISO 3166-1 Alpha 2 (uppercase, two letters) for the optional region code. Codes outside these standards (en-uk, es-419, three-letter codes) are silently ignored. Reserved codes like EU, UN, and UK have no effect on Google Search.
in International SEO
How do I avoid duplicate content issues on multilingual sites?SEOGoogleInternational SEOCanonical Tags+
Use hreflang to tell Google which language and country version of similar content goes to which audience. Localize properly (not just translate) so the content reads differently per market. Ensure each language version lives on a unique URL. Without these signals, similar pages compete and Google picks one to index, dropping rankings.
in International SEO
Should each language version have its own unique URL?SEOGoogleCrawl EfficiencySite ArchitectureInternational SEO+
Yes. Each language version must live on its own URL (ccTLD, subdirectory, or subdomain). Without unique URLs, Google cannot serve the right version to the right user and hreflang cannot work. Switching languages via JavaScript without changing the URL is invisible to Googlebot and breaks international indexing.
in International SEO
How do canonical tags interact with hreflang?SEOGoogleInternational SEOCanonical Tags+
Each language version should have a self-canonical tag pointing to its own URL, plus hreflang tags pointing to all alternate language versions. Pointing the canonical to a different language (the English version, for instance) tells Google to ignore the localized versions, overriding hreflang and collapsing all rankings into the canonical URL.
in International SEO
Can I use more than one hreflang implementation method at the same time?SEOGoogleInternational SEOSitemaps+
Avoid it. Google supports HTML head, XML sitemap, and HTTP header implementations, but mixing them creates conflicts where one declaration overrides another. Pick a single method per site and document it. The only common exception is using sitemap-based hreflang for HTML pages and HTTP headers for non-HTML files like PDFs.
in International SEO
How do I validate hreflang implementation?SEOAnalytics & TrackingInternational SEO+
Use a dedicated tool: Merkle's hreflang Tag Testing Tool for spot-checking single URLs, or Aleyda Solis's audit for sitewide validation. SEO crawlers like Screaming Frog, Sitebulb, Ahrefs Site Audit, and Semrush all report reciprocal-link errors, wrong language codes, and broken URLs in hreflang. Cross-check with Search Console's International Targeting report for region-level issues.
in International SEO
What are the most common hreflang mistakes?SEOInternational SEO+
Six recur most often: using "en-uk" instead of "en-gb," missing reciprocal tags between paired pages, missing self-referencing tags, pointing hreflang at redirected or 404 URLs, mixing canonical and hreflang so they fight each other, and declaring the same language code on two different pages. Any one of these can void the entire setup.
in International SEO
Why is Google showing the wrong language or country version in search?SEOGEOGoogleAI Overviews & CitationsCrawl EfficiencyInternational SEOCanonical Tags+
Most common cause is broken hreflang (missing reciprocal tags, wrong codes, conflict with canonical). Other causes: insufficient geo-signals on the page itself (currency, address, phone format), thin or untranslated content, IP-based auto-redirects that block Googlebot from crawling all versions, or duplicate content where Google has consolidated to one version.
in International SEO
How does Google choose which international page to rank?SEOGEOGoogleAnalytics & TrackingAI Overviews & CitationsSite ArchitectureOn-Page OptimizationInternational SEO+
Google combines three signals: hreflang annotations declaring language-region pairs, geotargeting structure (ccTLD, subdirectory, or geo-folder in Search Console), and on-page localization cues like currency, address, and phone-number format. Hosting location matters minimally today. When signals align, Google serves the version matching the searcher's location and Accept-Language header.
in International SEO
Should I automatically redirect users by location or browser language?SEOCrawl Efficiency+
No. Automatic IP- or browser-based redirects block Googlebot (which crawls from US IPs and one language) from seeing your other localized versions, hurting indexing. They also break expats, travelers, and shared computers. Use a non-intrusive banner or modal to suggest the relevant version, and remember user preference via cookie if they switch.
in International SEO
How do I do keyword research for each market?SEOGoogleKeyword ResearchSERP FeaturesInternational SEO+
Run Google with the location set to the target country and the language set to local usage. Mine autocomplete, related searches, and the People Also Ask box for native terms. Layer in Google Keyword Planner with precise location-and-language targeting. Do not translate your home-market keywords directly. Users in different markets express needs differently.
in International SEO
How do I localize content instead of just translating it?SEO+
Localization adds cultural fluency on top of translation: adapt holidays, units, currency, idiom, and tone for each market. Have a native speaker review every translated page. Study the local SERP to see how competitors phrase the offering. Respect local cultural and linguistic groups; surface the version a local would write.
in International SEO
Should metadata like title tags and descriptions be translated too?SEOGoogleStructured Data / SchemaOn-Page OptimizationImage Optimization+
Yes. Translate every metadata field including title tags, meta descriptions, alt text, schema strings, and Open Graph tags. Many multilingual sites translate body copy but leave metadata in the source language, which kills SERP relevance because Google reads metadata first. Treat metadata as part of your content, not as configuration to copy across.
in International SEO
How do I structure internal links on a multilingual website?SEOLink BuildingInternal Linking+
Internal links should stay within the same language version. A French page links to other French pages, not the English homepage. Use a clear language switcher in the header for users who swap. Translate anchor text. Avoid stranded pages with no internal links from their own language cluster.
in International SEO
How do I plan a site migration without losing search traffic?SEOAnalytics & TrackingSite Architecture+
Set clear goals (speed, CMS, domain change). Document URL structure, content hierarchy, and analytics baselines two to four weeks before launch. Build on staging, audit, map every URL to its new destination with 301s. Then DNS-cut, monitor Search Console daily, and expect months for full traffic recovery on complex moves.
in Site Migrations & Redirects
What should be included in a pre-migration SEO audit?SEOGooglePage Speed / Core Web VitalsAnalytics & TrackingIndexingSite ArchitectureInternal Linking+
Capture baseline keyword rankings, indexed page count, organic traffic, conversion rates, and Core Web Vitals from Google Search Console, GA4, and Semrush. Document URL structure, content hierarchy, internal linking, navigation, dynamic elements, and third-party integrations. Run a technical SEO audit to find existing issues so you do not migrate broken pages forward.
in Site Migrations & Redirects
How do I map old URLs to new URLs during a migration?SEOAnalytics & TrackingSitemaps+
Export old URLs from Search Console, GA4, Semrush, your sitemap, and a Screaming Frog crawl. Deduplicate. Build a spreadsheet with old URL in column A, new URL in column B. Use Page Name + VLOOKUP for large sites so URL changes propagate. Validate every mapping renders 200 on the new site.
in Site Migrations & Redirects
What is the best 301 redirect strategy for site migrations?SEOLink Building+
One 301 per old URL straight to its closest content equivalent on the new site, not to the homepage. Never use 302, meta refresh, or JavaScript redirects on a permanent move. Implement before DNS cut so day-one traffic redirects cleanly. Keep redirects in place at least a year so backlinks and bookmarks still resolve.
in Site Migrations & Redirects