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 | Type | Period of validity | Description | Domain where it is set |
|---|---|---|---|---|
| _ym_metrika_enabled | Analytical | 60 minutes | Checks whether other Yandex Metrica cookies are installed correctly | The domain where the tag is installed |
| _ym_isad | 2 days | Used to determine if a visitor has ad blockers | ||
| _ym_uid | 1 year | Used for identifying site users | ||
| _ym_d | Saves the date of the user's first site session | |||
| _ym_ucs | Source for _ym_uid. It appears if you enable server-side cookie resetting. | |||
| gdpr | Technical | Up to 2 years | Used for identifying users who fall under the General Data Protection Regulation (GDPR) jurisdiction. | |
| _ym_debug | Technical | Until the session ends | Indicates that debug mode is active | |
| _ym_visorc_* | Analytical | 30 minutes | Allows Session Replay to function correctly | |
| _ym_hostIndex | 1 day | Limits the number of requests | ||
| _ym_sup_debug | Technical | 1 day | Used for debugging Yandex Metrica tags | |
| is_gdpr | Technical | Up to 2 years | Used for identifying users who fall under the General Data Protection Regulation (GDPR) jurisdiction. | All Yandex Metrica domains |
| is_gdpr_b | ||||
| yabs-sid | Technical | Within the browser session | Session ID | |
| i | Technical | 1 year | Used for identifying site users | |
| yandexuid | 1 year (in some countries, the period may be longer) | |||
| yuidss | ||||
| ymex | Analytical | 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 | Type | Period of validity | Description | Domain where it is set |
|---|---|---|---|---|
| _ym_metrika_enabled | Analytical | 60 minutes | Checks whether other Yandex Metrica cookies are installed correctly | The domain where the tag is installed |
| _ym_isad | 2 days | Used to determine if a visitor has ad blockers | ||
| _ym_uid | 1 year | Used for identifying site users | ||
| _ym_d | Saves the date of the user's first site session | |||
| _ym_ucs | Source for _ym_uid. It appears if you enable server-side cookie resetting. | |||
| gdpr | Technical | Up to 2 years | Used for identifying users who fall under the General Data Protection Regulation (GDPR) jurisdiction. | |
| _ym_debug | Technical | Until the session ends | Indicates that debug mode is active | |
| _ym_visorc_* | Analytical | 30 minutes | Allows Session Replay to function correctly | |
| _ym_hostIndex | 1 day | Limits the number of requests | ||
| _ym_sup_debug | Technical | 1 day | Used for debugging Yandex Metrica tags | |
| is_gdpr | Technical | Up to 2 years | Used for identifying users who fall under the General Data Protection Regulation (GDPR) jurisdiction. | All Yandex Metrica domains |
| is_gdpr_b | ||||
| yabs-sid | Technical | Within the browser session | Session ID | |
| i | Technical | 1 year | Used for identifying site users | |
| yandexuid | 1 year (in some countries, the period may be longer) | |||
| yuidss | ||||
| ymex | Analytical | 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 number>_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 from the Yandex Metrica tag in the browser |
| _ym_hide_phones | Allows hiding phone numbers |
| _ym_retryReqs | Contains requests that the tag couldn't send to the server |
| _ym_uid | Used for identifying site users |
| zz | Used for identifying site users |
| Name | Description |
|---|---|
| _ym<tag number>_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 from the Yandex Metrica tag in the browser |
| _ym_hide_phones | Allows hiding phone numbers |
| _ym_retryReqs | Contains requests that the tag couldn't send to the server |
| _ym_uid | Used for identifying site users |
| zz | Used for identifying site users |
sessionStorage
| Name | Type | Description | Domain where it is set |
|---|---|---|---|
| _ym_debugger_state | Technical | Used for debugging Yandex Metrica tags | The domain where the tag is installed |
| _ym_turbo_uid | Distinguishes between users on Turbo pages |
| Name | Type | Description | Domain where it is set |
|---|---|---|---|
| _ym_debugger_state | Technical | Used for debugging Yandex Metrica tags | The domain where the tag is installed |
| _ym_turbo_uid | Distinguishes between users on Turbo pages |
