Vercatushreflang reciprocity
Each language version must list itself as well as all other language versions in its hreflang annotations. If two pages do not both point to each other, Google ignores those tags; it still processes the pairs that do point to each other. x-default names the fallback page for unmatched languages. Codes must be ISO 639-1 language codes with an optional ISO 3166-1 Alpha 2 region; other codes (such as es-419) are not supported.
Sources
- 1
AGrade A: official documentation or a standard. A grade describes the provenance of the sources above; it is not a probability that a change will work. The effect basis says how the size of the effect is known: measured by a study, taken from an industry report, only documented without a size, or not quantified.
Put this evidence to work
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