Nevertheless, provide as clear signals as possible about which pages are in which language for users. However, hreflang is only a signal—not a guideline. The search engine doesn't have to follow it if it believes other factors are more important.
Note that Google and Yandex currently use the hreflang attribute, while Bing uses meta tags instead.
To get the most out of the hreflang attribute, the following tips are important:
Where are the hreflang attributes placed?
The hreflang attribute can be placed in the page markup, in the greece cell phone number list/ HTTP header, or in the sitemap. Please do not add it everywhere, but only in one of these places.
How are the attributes structured?
The hreflang attribute on every page should include a reference to itself and all pages that need to be marked up. If your German website sells your products to customers in Germany, Austria, Switzerland, France, and Portugal, the code might look like this: