hreflang Attribute | Glossary | 247COMPASS

Technical SEO & Web Infrastructure

hreflang

The hreflang attribute declares language and regional alternatives in the HTML head or sitemap, for example using the language-region value ko-KR. It helps search engines select the appropriate version for a user’s language and location. Alternate pages need reciprocal return references: if A points to B but B does not point back, the relationship may be ignored. Validate ISO 639-1 language codes, ISO 3166-1 region codes and the hyphenated format before release.

Business applications and impact#

Helps users reach the appropriate localized version and clarifies the relationship between equivalent pages.

Implementation guidance and considerations#

Check reciprocal return tags and correctly formatted language-region codes.

XML Sitemap

사이트맵

An XML document listing important URLs and their modification dates for search engines.

Duplicate Content

중복 콘텐츠

Identical or substantially similar content available at multiple URLs within or across domains.

301 Redirect

301 리디렉션

An HTTP status code indicating a permanent move to a new URL and supporting the transfer of link equity.

302 Redirect

302 리다이렉트

An HTTP response code indicating that a resource is temporarily available at another URL.

404 Not Found

404 오류

An HTTP client-error status indicating that the requested resource was not found.

HTTP Status Code

HTTP 상태 코드

A three-digit response code describing the outcome of an HTTP request.