Informer SQI

SQI
(The site quality index)
The site quality index indicates how useful your site is for users according to Yandex.
The quality index is based on the size of the site's audience, the degree of user satisfaction with the site, the level of trust that users and Yandex place in this site, and other criteria. The calculation uses data received from Yandex services. The index value is updated regularly.
If the site has a mirror, the secondary mirror has the same quality index as the main mirror.
The quality index for a subdomain is usually the same as for the site's primary domain.