hreflang tags are a technical solution for sites that have similar content in multiple languages. The owner of a multilingual site wants search engines to send people to the content in their own language. Say a user is Dutch and the page that ranks is English, but there’s also a Dutch version. You would want Google to show the Dutch page in the search results for that Dutch user. This is the kind of problem hreflang was designed to solve.
In this (very long) article we’ll discuss :
- What hreflang is for.
- The SEO benefit of hreflang.
- What hreflang is.
- What hreflang achieves.
- Whether or not you should use hreflang.
- Which architectural decisions you should make.
- The basic technical ideas about hreflang you should know.
- Implementation decisions you should make.
- Which other technical things we need to account for, like:
- how rel=”canonical” and hreflang work together.
- Which tools to use when developing and testing your implementation.
- How to make sure your implementation keeps working once you’ve set it up.
>> read the full guide : hreflang: The ultimate guide
Source : Yoast