Yandex Webmaster collects information about the site based on data from other Yandex services. This information helps calculate site quality indicators. They reflect how useful the site is for users.
You can find the data on the Website information page. It is also available in Yandex search results
Site's ratings and reviews. Grades 1-3 are considered bad, 4 and 5 are considered good. When rating a site, users can leave a review about it. Ratings can be displayed on the Quality indicators page if there's more than 10 site reviews.
Progress in getting badges. Some badges may already be assigned. A label is displayed for them. For other badges, there is a progress bar showing the site's current progress towards obtaining the badge. The label may be gray if there is not enough data to confirm it. Some badges may not be displayed if they haven't been awarded yet.
Note
The badges available and the site progress to receive the badges may differ from country to country.
The SQI value is recalculated regularly taking into account many factors. During the time between recalculations, site-related factors may change. Therefore, we recommend improving the site, filling it with useful content, etc. Over time, SQI may increase.