Notes on various topics No. 6

Hreflang or how to please Google

However, choosing how to place the language versions is only the first step in properly configuring them for SEO. It is also strongly recommended to assign options for different languages in the page code so that search engines do not have problems interpreting them and displaying them correctly in search results. Google recommends using the "hreflang" attribute for this. This allows you to inform search engine robots about the relationships between pages designed for different languages and locations. It is important to note that the hreflang attribute can be used both when using language variations in subdomains, as well as in TLD domains and subdirectories.

An additional advantage of using it is to prevent the negative phenomenon of duplicate content. This can happen, for example, if we have different versions of a page in the same or very similar language created for recipients in different locations (for example, pages in English for users in the United States, Australia, Great Britain, or Ireland). Their "standard" indexing can lead to duplicate content, meaning the same content appears at different addresses. However, by properly configuring hreflang on such pages, we can tell Google which regional version should be present in the search results for a given country (and hint that they are not duplicates).

Technically, implementing the hreflang attribute is not a very difficult task. You can use one of three methods:

The above solution can only be used for variants hosted in directories of the same domain.

The easiest way to check if the hreflang attribute is implemented correctly on a website is to use a special tool available in the Google search console. The functionality located in the "Search Traffic" section on the "International Targeting" tab contains accurate information about the hreflang tags found on the site and the errors found.
The URLs of the pages where one of the two types of errors was found are listed here.:

1. There are no return tags
If side A contains an tag indicating an alternative side to B, then side B must have a return tag on side A.

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