| __gads |
13 months |
Used by Google AdSense for experimenting with advertisement efficiency |
| __utmd |
Session |
To store and track visitor journeys through the site and classifies them into groups |
| *gac*UA |
90 days |
Contains campaign related information for the user |
| _utm |
2 years |
To store and track visits across websites |
| *dc*gtm_UA |
1 minute |
To store number of service requests |
| UTMD_ |
Session |
To store and count pageviews |
| __utm.gif |
Session |
Google Analytics tracking pixel |
| gtag_logged_in |
Session |
Tracks logged in status for analytics purposes |
| *gat*gtag_UA_ |
1 minute |
Used to throttle request rate |
| utm_campaign |
6 months |
To provide parameters to URLs to identify the campaigns that refer traffic |
| utm_source |
6 months |
To provide parameters to URLs to identify the campaigns that refer traffic |
| *opt*expid |
10 seconds |
Thrown when a redirect experiment is running. Stores the experiment ID, variation ID, and referral source to the redirected page |
| *opt*utmc |
24 hours |
Retains the last query parameter utm_campaign |
| *opt*awkid |
24 hours |
Used for campaigns linked to Google Ads Criteria IDs |
| *opt*awgid |
24 hours |
Used for campaigns associated with Google Ads ad group IDs |
| *opt*awmid |
24 hours |
Used for campaigns linked to Google Ads Campaign IDs |
| *opt*awcid |
24 hours |
Used for campaigns that are linked to Google Ads customer IDs |
| *gac* |
90 days |
Contains campaign related information for the user |
| *gac*gb_ |
90 days |
Contains campaign related information specific to Google Business |
| *ga* |
2 years |
Used to distinguish users |
| _gaexp |
93 days |
Used to determine a user's inclusion in an experiment |
| __utmxx |
18 months |
Determines when the experiment in which the user participated expires |
| __utmx |
18 months |
Determines if the user took part in the experiment |
| __utmv |
2 years |
Stores data about a visitor level custom variable. Updated every time data is sent to Google Analytics |
| __utmz |
6 months |
Stores information about the source of traffic or campaign, allowing you to understand where the user came to the site from |
| __utmc |
Session |
Not used in ga.js. Installed for interoperability with urchin.js |
| __utmb |
30 minutes |
Used to define new sessions/visits. Updated every time data is sent to Google Analytics |
| __utmt |
10 minutes |
Limits the frequency of requests |
| __utma |
2 years |
Allows you to distinguish between users and sessions. Updated every time data is sent to Google Analytics |
| AMP_TOKEN |
30 seconds to 1 year |
Contains a token that can be used to get the Client-ID from the AMP service |
| _gat |
1 minute |
Used to throttle request rate |
| _gid |
24 hours |
Allows you to differentiate between users |
| _ga |
2 years |
Used to distinguish users |
