Mirrors are sites that are available at different addresses, but have the same content. To prevent sites from duplicating information in search results, Yandex combines them into a group of mirrors:
- the main mirror is the address that participates in the search results;
- non-primary mirror – an address that is not involved in the search.
When merging, some of the accumulated indicators are assigned to the main mirror, for example, external links of the old site will be counted as external links of the new one. At the same time, in Yandex.Webmaster on the External links page, the addresses specified on the third-party website will be displayed.
