Temporary files installed by Yandex.Metrica
Yandex.Metrica provides depersonalized information about your site's traffic. The available statistics include the number of users, traffic sources, and user behavior on site pages. In order to count the site's users, Yandex.Metrica uses anonymous browser identifiers that are stored in cookies or in localStorage properties. These cookies and properties are set on the top-level domain, such as .example.com.
Cookie
| Name | Period of validity | Description | Domain where it is set |
|---|---|---|---|
| _ym_metrika_enabled | 60 minutes | Checks whether other Yandex.Metrica cookies are installed correctly | The domain where the tag is installed |
| _ym_isad | 2 days | Determines whether a user has ad blockers | |
| _ym_uid | 1 year | Used for identifying site users | |
| _ym_d | Saves the date of the user's first site session | ||
| yabs-sid | Until the session ends | Session ID | All Yandex.Metrica domains |
| _ym_debug | Indicates that debug mode is active | ||
| _ym_visorc_* | 30 minutes | Allows Session Replay to function correctly | |
| _ym_hostIndex | 1 day | Limits the number of requests | |
| i | 1 year | Used for identifying site users | |
| yandexuid | 1 year (in some countries, the period may be longer) | ||
| yuidss | |||
| ymex | 1 year | Stores auxiliary information for Yandex.Metrica performance: ID creation time and their alternative values. | |
| usst | Stores auxiliary information for syncing site user IDs between different Yandex domains |
| Name | Period of validity | Description | Domain where it is set |
|---|---|---|---|
| _ym_metrika_enabled | 60 minutes | Checks whether other Yandex.Metrica cookies are installed correctly | The domain where the tag is installed |
| _ym_isad | 2 days | Determines whether a user has ad blockers | |
| _ym_uid | 1 year | Used for identifying site users | |
| _ym_d | Saves the date of the user's first site session | ||
| yabs-sid | Until the session ends | Session ID | All Yandex.Metrica domains |
| _ym_debug | Indicates that debug mode is active | ||
| _ym_visorc_* | 30 minutes | Allows Session Replay to function correctly | |
| _ym_hostIndex | 1 day | Limits the number of requests | |
| i | 1 year | Used for identifying site users | |
| yandexuid | 1 year (in some countries, the period may be longer) | ||
| yuidss | |||
| ymex | 1 year | Stores auxiliary information for Yandex.Metrica performance: ID creation time and their alternative values. | |
| usst | Stores auxiliary information for syncing site user IDs between different Yandex domains |
localStorage
These properties are set on the domain where the Yandex.Metrica tag is embedded.
| Name | Description |
|---|---|
| _ym<tag ID>_lastHit | Used for specifying the time in order to get an accurate bounce rate |
| _ym<tag ID>_lsid | Used for identifying site users |
| _ym<tag ID>_reqNum | Used for determining the ordinal number of the request for the Yandex.Metrica tag in the browser |
| _ym_retryReqs | Contains requests that the tag couldn't send to the server |
| zz | Used for identifying site users |
| Name | Description |
|---|---|
| _ym<tag ID>_lastHit | Used for specifying the time in order to get an accurate bounce rate |
| _ym<tag ID>_lsid | Used for identifying site users |
| _ym<tag ID>_reqNum | Used for determining the ordinal number of the request for the Yandex.Metrica tag in the browser |
| _ym_retryReqs | Contains requests that the tag couldn't send to the server |
| zz | Used for identifying site users |
